157953979 has 4 divisors (see below), whose sum is σ = 158078376. Its totient is φ = 157829584.

The previous prime is 157953947. The next prime is 157953989. The reversal of 157953979 is 979359751.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 979359751 = 73 ⋅13415887.

It is a cyclic number.

It is not a de Polignac number, because 157953979 - 2⁵ = 157953947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157953989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60274 + ... + 62839.

It is an arithmetic number, because the mean of its divisors is an integer number (39519594).

Almost surely, 2^157953979 is an apocalyptic number.

157953979 is a deficient number, since it is larger than the sum of its proper divisors (124397).

157953979 is a wasteful number, since it uses less digits than its factorization.

157953979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124396.

The product of its digits is 2679075, while the sum is 55.

The square root of 157953979 is about 12567.9743395664. The cubic root of 157953979 is about 540.5595240695.

The spelling of 157953979 in words is "one hundred fifty-seven million, nine hundred fifty-three thousand, nine hundred seventy-nine".