15768013 has 2 divisors, whose sum is σ = 15768014. Its totient is φ = 15768012.

The previous prime is 15767989. The next prime is 15768023. The reversal of 15768013 is 31086751.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11819844 + 3948169 = 3438^2 + 1987^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15768013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15768023) 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, 7884006 + 7884007.

It is an arithmetic number, because the mean of its divisors is an integer number (7884007).

Almost surely, 2^15768013 is an apocalyptic number.

It is an amenable number.

15768013 is a deficient number, since it is larger than the sum of its proper divisors (1).

15768013 is an equidigital number, since it uses as much as digits as its factorization.

15768013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 15768013 is about 3970.8957427764. The cubic root of 15768013 is about 250.7604206964.

The spelling of 15768013 in words is "fifteen million, seven hundred sixty-eight thousand, thirteen".