157161769 has 2 divisors, whose sum is σ = 157161770. Its totient is φ = 157161768.

The previous prime is 157161761. The next prime is 157161799. The reversal of 157161769 is 967161751.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131790400 + 25371369 = 11480^2 + 5037^2 .

It is a cyclic number.

It is not a de Polignac number, because 157161769 - 2³ = 157161761 is a prime.

It is a super-2 number, since 2×157161769² = 49399643270418722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (157161761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78580884 + 78580885.

It is an arithmetic number, because the mean of its divisors is an integer number (78580885).

Almost surely, 2^157161769 is an apocalyptic number.

It is an amenable number.

157161769 is a deficient number, since it is larger than the sum of its proper divisors (1).

157161769 is an equidigital number, since it uses as much as digits as its factorization.

157161769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 79380, while the sum is 43.

The square root of 157161769 is about 12536.4177100159. The cubic root of 157161769 is about 539.6542929008.

The spelling of 157161769 in words is "one hundred fifty-seven million, one hundred sixty-one thousand, seven hundred sixty-nine".