7979157 has 12 divisors (see below), whose sum is σ = 11572704. Its totient is φ = 5297640.

The previous prime is 7979141. The next prime is 7979173. The reversal of 7979157 is 7519797.

It is an interprime number because it is at equal distance from previous prime (7979141) and next prime (7979173).

It is not a de Polignac number, because 7979157 - 2⁴ = 7979141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7979197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 682 + ... + 4052.

It is an arithmetic number, because the mean of its divisors is an integer number (964392).

Almost surely, 2^7979157 is an apocalyptic number.

It is an amenable number.

7979157 is a deficient number, since it is larger than the sum of its proper divisors (3593547).

7979157 is a wasteful number, since it uses less digits than its factorization.

7979157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3640 (or 3637 counting only the distinct ones).

The product of its digits is 138915, while the sum is 45.

The square root of 7979157 is about 2824.7401650417. The cubic root of 7979157 is about 199.8261572706.

The spelling of 7979157 in words is "seven million, nine hundred seventy-nine thousand, one hundred fifty-seven".