156717013 has 2 divisors, whose sum is σ = 156717014. Its totient is φ = 156717012.

The previous prime is 156717007. The next prime is 156717023. The reversal of 156717013 is 310717651.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 153190129 + 3526884 = 12377^2 + 1878^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-156717013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (156717023) 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, 78358506 + 78358507.

It is an arithmetic number, because the mean of its divisors is an integer number (78358507).

Almost surely, 2^156717013 is an apocalyptic number.

It is an amenable number.

156717013 is a deficient number, since it is larger than the sum of its proper divisors (1).

156717013 is an equidigital number, since it uses as much as digits as its factorization.

156717013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4410, while the sum is 31.

The square root of 156717013 is about 12518.6665823481. Note that the first 3 decimals coincide. The cubic root of 156717013 is about 539.1447515738.

The spelling of 156717013 in words is "one hundred fifty-six million, seven hundred seventeen thousand, thirteen".