157145717 has 2 divisors, whose sum is σ = 157145718. Its totient is φ = 157145716.

The previous prime is 157145707. The next prime is 157145731. The reversal of 157145717 is 717541751.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 152794321 + 4351396 = 12361^2 + 2086^2 .

It is a cyclic number.

It is not a de Polignac number, because 157145717 - 2²² = 152951413 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157145707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78572858 + 78572859.

It is an arithmetic number, because the mean of its divisors is an integer number (78572859).

Almost surely, 2^157145717 is an apocalyptic number.

It is an amenable number.

157145717 is a deficient number, since it is larger than the sum of its proper divisors (1).

157145717 is an equidigital number, since it uses as much as digits as its factorization.

157145717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34300, while the sum is 38.

The square root of 157145717 is about 12535.7774788802. Note that the first 3 decimals coincide. The cubic root of 157145717 is about 539.6359194212.

The spelling of 157145717 in words is "one hundred fifty-seven million, one hundred forty-five thousand, seven hundred seventeen".