13009957 has 4 divisors (see below), whose sum is σ = 13174720. Its totient is φ = 12845196.

The previous prime is 13009949. The next prime is 13009961. The reversal of 13009957 is 75990031.

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: 75990031 = 13 ⋅5845387.

It is a cyclic number.

It is not a de Polignac number, because 13009957 - 2³ = 13009949 is a prime.

It is a super-2 number, since 2×13009957² = 338517962283698, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13009907) 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, 82263 + ... + 82420.

It is an arithmetic number, because the mean of its divisors is an integer number (3293680).

Almost surely, 2^13009957 is an apocalyptic number.

It is an amenable number.

13009957 is a deficient number, since it is larger than the sum of its proper divisors (164763).

13009957 is an equidigital number, since it uses as much as digits as its factorization.

13009957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164762.

The product of its (nonzero) digits is 8505, while the sum is 34.

The square root of 13009957 is about 3606.9317986344. The cubic root of 13009957 is about 235.1934848354.

Adding to 13009957 its reverse (75990031), we get a palindrome (88999988).

The spelling of 13009957 in words is "thirteen million, nine thousand, nine hundred fifty-seven".