157391669 has 2 divisors, whose sum is σ = 157391670. Its totient is φ = 157391668.

The previous prime is 157391639. The next prime is 157391699. The reversal of 157391669 is 966193751.

It is a happy number.

157391669 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (157391639) and next prime (157391699).

It can be written as a sum of positive squares in only one way, i.e., 113699569 + 43692100 = 10663^2 + 6610^2 .

It is a cyclic number.

It is not a de Polignac number, because 157391669 - 2⁸ = 157391413 is a prime.

It is a super-2 number, since 2×157391669² = 49544274941211122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157391629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78695834 + 78695835.

It is an arithmetic number, because the mean of its divisors is an integer number (78695835).

Almost surely, 2^157391669 is an apocalyptic number.

It is an amenable number.

157391669 is a deficient number, since it is larger than the sum of its proper divisors (1).

157391669 is an equidigital number, since it uses as much as digits as its factorization.

157391669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 306180, while the sum is 47.

The square root of 157391669 is about 12545.5836452514. The cubic root of 157391669 is about 539.9173044377.

The spelling of 157391669 in words is "one hundred fifty-seven million, three hundred ninety-one thousand, six hundred sixty-nine".