13163857 has 4 divisors (see below), whose sum is σ = 15044416. Its totient is φ = 11283300.

The previous prime is 13163851. The next prime is 13163863. The reversal of 13163857 is 75836131.

13163857 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 an interprime number because it is at equal distance from previous prime (13163851) and next prime (13163863).

It is not a de Polignac number, because 13163857 - 2¹¹ = 13161809 is a prime.

It is a super-2 number, since 2×13163857² = 346574262232898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13163851) 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, 940269 + ... + 940282.

It is an arithmetic number, because the mean of its divisors is an integer number (3761104).

Almost surely, 2^13163857 is an apocalyptic number.

It is an amenable number.

13163857 is a deficient number, since it is larger than the sum of its proper divisors (1880559).

13163857 is an equidigital number, since it uses as much as digits as its factorization.

13163857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1880558.

The product of its digits is 15120, while the sum is 34.

The square root of 13163857 is about 3628.2029987309. The cubic root of 13163857 is about 236.1172511785.

Adding to 13163857 its reverse (75836131), we get a palindrome (88999988).

The spelling of 13163857 in words is "thirteen million, one hundred sixty-three thousand, eight hundred fifty-seven".