157023929 has 2 divisors, whose sum is σ = 157023930. Its totient is φ = 157023928.

The previous prime is 157023913. The next prime is 157023941. The reversal of 157023929 is 929320751.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 156750400 + 273529 = 12520^2 + 523^2 .

It is an emirp because it is prime and its reverse (929320751) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 157023929 - 2⁴ = 157023913 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 157023892 and 157023901.

It is not a weakly prime, because it can be changed into another prime (157023989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78511964 + 78511965.

It is an arithmetic number, because the mean of its divisors is an integer number (78511965).

Almost surely, 2^157023929 is an apocalyptic number.

It is an amenable number.

157023929 is a deficient number, since it is larger than the sum of its proper divisors (1).

157023929 is an equidigital number, since it uses as much as digits as its factorization.

157023929 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34020, while the sum is 38.

The square root of 157023929 is about 12530.9189208134. The cubic root of 157023929 is about 539.4964773673.

The spelling of 157023929 in words is "one hundred fifty-seven million, twenty-three thousand, nine hundred twenty-nine".