157285669 has 2 divisors, whose sum is σ = 157285670. Its totient is φ = 157285668.

The previous prime is 157285643. The next prime is 157285679. The reversal of 157285669 is 966582751.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125216100 + 32069569 = 11190^2 + 5663^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157285669 is a prime.

It is a super-2 number, since 2×157285669² = 49477563345555122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157285619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78642834 + 78642835.

It is an arithmetic number, because the mean of its divisors is an integer number (78642835).

Almost surely, 2^157285669 is an apocalyptic number.

It is an amenable number.

157285669 is a deficient number, since it is larger than the sum of its proper divisors (1).

157285669 is an equidigital number, since it uses as much as digits as its factorization.

157285669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 907200, while the sum is 49.

The square root of 157285669 is about 12541.3583395101. The cubic root of 157285669 is about 539.7960695433.

The spelling of 157285669 in words is "one hundred fifty-seven million, two hundred eighty-five thousand, six hundred sixty-nine".