157313779 has 4 divisors (see below), whose sum is σ = 179787184. Its totient is φ = 134840376.

The previous prime is 157313771. The next prime is 157313837. The reversal of 157313779 is 977313751.

157313779 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.

It is a cyclic number.

It is not a de Polignac number, because 157313779 - 2³ = 157313771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157313771) 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, 11236692 + ... + 11236705.

It is an arithmetic number, because the mean of its divisors is an integer number (44946796).

Almost surely, 2^157313779 is an apocalyptic number.

157313779 is a deficient number, since it is larger than the sum of its proper divisors (22473405).

157313779 is an equidigital number, since it uses as much as digits as its factorization.

157313779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22473404.

The product of its digits is 138915, while the sum is 43.

The square root of 157313779 is about 12542.4789814454. The cubic root of 157313779 is about 539.8282249706.

The spelling of 157313779 in words is "one hundred fifty-seven million, three hundred thirteen thousand, seven hundred seventy-nine".