815713 has 2 divisors, whose sum is σ = 815714. Its totient is φ = 815712.

The previous prime is 815693. The next prime is 815729. The reversal of 815713 is 317518.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 677329 + 138384 = 823^2 + 372^2 .

It is a cyclic number.

It is not a de Polignac number, because 815713 - 2⁵ = 815681 is a prime.

It is not a weakly prime, because it can be changed into another prime (815413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 407856 + 407857.

It is an arithmetic number, because the mean of its divisors is an integer number (407857).

2⁸¹⁵⁷¹³ is an apocalyptic number.

It is an amenable number.

815713 is a deficient number, since it is larger than the sum of its proper divisors (1).

815713 is an equidigital number, since it uses as much as digits as its factorization.

815713 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 840, while the sum is 25.

The square root of 815713 is about 903.1683121102. The cubic root of 815713 is about 93.4356177404.

The spelling of 815713 in words is "eight hundred fifteen thousand, seven hundred thirteen".