12553913 has 4 divisors (see below), whose sum is σ = 12860148. Its totient is φ = 12247680.

The previous prime is 12553909. The next prime is 12553921. The reversal of 12553913 is 31935521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1075369 + 11478544 = 1037^2 + 3388^2 .

It is a cyclic number.

It is not a de Polignac number, because 12553913 - 2² = 12553909 is a prime.

It is a super-2 number, since 2×12553913² = 315201463223138, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12553943) 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, 153056 + ... + 153137.

It is an arithmetic number, because the mean of its divisors is an integer number (3215037).

Almost surely, 2^12553913 is an apocalyptic number.

It is an amenable number.

12553913 is a deficient number, since it is larger than the sum of its proper divisors (306235).

12553913 is an equidigital number, since it uses as much as digits as its factorization.

12553913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306234.

The product of its digits is 4050, while the sum is 29.

The square root of 12553913 is about 3543.1501520540. The cubic root of 12553913 is about 232.4126191079.

The spelling of 12553913 in words is "twelve million, five hundred fifty-three thousand, nine hundred thirteen".