12893905 has 8 divisors (see below), whose sum is σ = 16382952. Its totient is φ = 9708288.

The previous prime is 12893899. The next prime is 12893911. The reversal of 12893905 is 50939821.

It is an interprime number because it is at equal distance from previous prime (12893899) and next prime (12893911).

It can be written as a sum of positive squares in 4 ways, for example, as 1252161 + 11641744 = 1119^2 + 3412^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12893905 - 2⁵ = 12893873 is a prime.

It is a super-2 number, since 2×12893905² = 332505572298050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 75762 + ... + 75931.

It is an arithmetic number, because the mean of its divisors is an integer number (2047869).

Almost surely, 2^12893905 is an apocalyptic number.

It is an amenable number.

12893905 is a deficient number, since it is larger than the sum of its proper divisors (3489047).

12893905 is a wasteful number, since it uses less digits than its factorization.

12893905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151715.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 12893905 is about 3590.8084048025. The cubic root of 12893905 is about 234.4920672648.

The spelling of 12893905 in words is "twelve million, eight hundred ninety-three thousand, nine hundred five".