156740513 has 2 divisors, whose sum is σ = 156740514. Its totient is φ = 156740512.

The previous prime is 156740509. The next prime is 156740533. The reversal of 156740513 is 315047651.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 156175009 + 565504 = 12497^2 + 752^2 .

It is a cyclic number.

It is not a de Polignac number, because 156740513 - 2² = 156740509 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 156740513.

It is not a weakly prime, because it can be changed into another prime (156740533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78370256 + 78370257.

It is an arithmetic number, because the mean of its divisors is an integer number (78370257).

Almost surely, 2^156740513 is an apocalyptic number.

It is an amenable number.

156740513 is a deficient number, since it is larger than the sum of its proper divisors (1).

156740513 is an equidigital number, since it uses as much as digits as its factorization.

156740513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 156740513 is about 12519.6051455307. The cubic root of 156740513 is about 539.1716988043.

The spelling of 156740513 in words is "one hundred fifty-six million, seven hundred forty thousand, five hundred thirteen".