157974697 has 2 divisors, whose sum is σ = 157974698. Its totient is φ = 157974696.

The previous prime is 157974673. The next prime is 157974737. The reversal of 157974697 is 796479751.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 137733696 + 20241001 = 11736^2 + 4499^2 .

It is a cyclic number.

It is not a de Polignac number, because 157974697 - 2¹¹ = 157972649 is a prime.

It is not a weakly prime, because it can be changed into another prime (157974617) 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 as a sum of consecutive naturals, namely, 78987348 + 78987349.

It is an arithmetic number, because the mean of its divisors is an integer number (78987349).

Almost surely, 2^157974697 is an apocalyptic number.

It is an amenable number.

157974697 is a deficient number, since it is larger than the sum of its proper divisors (1).

157974697 is an equidigital number, since it uses as much as digits as its factorization.

157974697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3333960, while the sum is 55.

The square root of 157974697 is about 12568.7985503786. The cubic root of 157974697 is about 540.5831571612.

The spelling of 157974697 in words is "one hundred fifty-seven million, nine hundred seventy-four thousand, six hundred ninety-seven".