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12749977 = 26348479
BaseRepresentation
bin110000101000…
…110010011001
3212222202200101
4300220302121
511230444402
61133135401
7213241642
oct60506231
925882611
1012749977
117219279
12432a561
132845486
14199c6c9
1511bcb87
hexc28c99

12749977 has 4 divisors (see below), whose sum is σ = 12798720. Its totient is φ = 12701236.

The previous prime is 12749953. The next prime is 12750011. The reversal of 12749977 is 77994721.

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.

It is a cyclic number.

It is not a de Polignac number, because 12749977 - 215 = 12717209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12749917) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23977 + ... + 24502.

It is an arithmetic number, because the mean of its divisors is an integer number (3199680).

Almost surely, 212749977 is an apocalyptic number.

It is an amenable number.

12749977 is a deficient number, since it is larger than the sum of its proper divisors (48743).

12749977 is an equidigital number, since it uses as much as digits as its factorization.

12749977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48742.

The product of its digits is 222264, while the sum is 46.

The square root of 12749977 is about 3570.7109936258. The cubic root of 12749977 is about 233.6162959424.

The spelling of 12749977 in words is "twelve million, seven hundred forty-nine thousand, nine hundred seventy-seven".

Divisors: 1 263 48479 12749977