8129957 has 4 divisors (see below), whose sum is σ = 8869056. Its totient is φ = 7390860.

The previous prime is 8129939. The next prime is 8129963. The reversal of 8129957 is 7599218.

8129957 is digitally balanced in base 3, 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 a cyclic number.

It is not a de Polignac number, because 8129957 - 2¹⁸ = 7867813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8129917) 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, 369533 + ... + 369554.

It is an arithmetic number, because the mean of its divisors is an integer number (2217264).

Almost surely, 2^8129957 is an apocalyptic number.

It is an amenable number.

8129957 is a deficient number, since it is larger than the sum of its proper divisors (739099).

8129957 is a wasteful number, since it uses less digits than its factorization.

8129957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 739098.

The product of its digits is 45360, while the sum is 41.

The square root of 8129957 is about 2851.3079454875. The cubic root of 8129957 is about 201.0771631823.

It can be divided in two parts, 812995 and 7, that multiplied together give a palindrome (5690965).

The spelling of 8129957 in words is "eight million, one hundred twenty-nine thousand, nine hundred fifty-seven".