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12889037 = 71841291
BaseRepresentation
bin110001001010…
…101111001101
3220020211102202
4301022233031
511244422122
61140131245
7214361240
oct61125715
926224382
1012889037
1173037a7
124396b25
132893865
1419d7257
1511e8e92
hexc4abcd

12889037 has 4 divisors (see below), whose sum is σ = 14730336. Its totient is φ = 11047740.

The previous prime is 12889033. The next prime is 12889073. The reversal of 12889037 is 73098821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 73098821 = 292520649.

It is a cyclic number.

It is not a de Polignac number, because 12889037 - 22 = 12889033 is a prime.

It is a super-2 number, since 2×128890372 = 332254549574738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12889033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 920639 + ... + 920652.

It is an arithmetic number, because the mean of its divisors is an integer number (3682584).

Almost surely, 212889037 is an apocalyptic number.

It is an amenable number.

12889037 is a deficient number, since it is larger than the sum of its proper divisors (1841299).

12889037 is an equidigital number, since it uses as much as digits as its factorization.

12889037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1841298.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 12889037 is about 3590.1304990209. The cubic root of 12889037 is about 234.4625532924.

The spelling of 12889037 in words is "twelve million, eight hundred eighty-nine thousand, thirty-seven".

Divisors: 1 7 1841291 12889037