13008857 has 4 divisors (see below), whose sum is σ = 13022976. Its totient is φ = 12994740.

The previous prime is 13008811. The next prime is 13008881. The reversal of 13008857 is 75880031.

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: 75880031 = 211 ⋅359621.

It is a cyclic number.

It is not a de Polignac number, because 13008857 - 2⁸ = 13008601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13008557) 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, 5573 + ... + 7554.

It is an arithmetic number, because the mean of its divisors is an integer number (3255744).

Almost surely, 2^13008857 is an apocalyptic number.

It is an amenable number.

13008857 is a deficient number, since it is larger than the sum of its proper divisors (14119).

13008857 is an equidigital number, since it uses as much as digits as its factorization.

13008857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14118.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 13008857 is about 3606.7793112415. The cubic root of 13008857 is about 235.1868560632.

Adding to 13008857 its reverse (75880031), we get a palindrome (88888888).

The spelling of 13008857 in words is "thirteen million, eight thousand, eight hundred fifty-seven".