915916013 has 2 divisors, whose sum is σ = 915916014. Its totient is φ = 915916012.

The previous prime is 915916003. The next prime is 915916031. The reversal of 915916013 is 310619519.

Together with next prime (915916031) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 602555209 + 313360804 = 24547^2 + 17702^2 .

It is a cyclic number.

It is not a de Polignac number, because 915916013 - 2¹² = 915911917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (915916003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 457958006 + 457958007.

It is an arithmetic number, because the mean of its divisors is an integer number (457958007).

Almost surely, 2^915916013 is an apocalyptic number.

It is an amenable number.

915916013 is a deficient number, since it is larger than the sum of its proper divisors (1).

915916013 is an equidigital number, since it uses as much as digits as its factorization.

915916013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7290, while the sum is 35.

The square root of 915916013 is about 30264.1043647421. The cubic root of 915916013 is about 971.1475464689.

The spelling of 915916013 in words is "nine hundred fifteen million, nine hundred sixteen thousand, thirteen".