999715613 has 6 divisors (see below), whose sum is σ = 1082532474. Its totient is φ = 922814256.

The previous prime is 999715589. The next prime is 999715663. The reversal of 999715613 is 316517999.

999715613 = 22357² + 22358².

It can be written as a sum of positive squares in 3 ways, for example, as 17689 + 999697924 = 133^2 + 31618^2 .

It is not a de Polignac number, because 999715613 - 2⁸ = 999715357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999715663) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2957570 + ... + 2957907.

It is an arithmetic number, because the mean of its divisors is an integer number (180422079).

Almost surely, 2^999715613 is an apocalyptic number.

999715613 is the 22358-th centered square number.

It is an amenable number.

999715613 is a deficient number, since it is larger than the sum of its proper divisors (82816861).

999715613 is a wasteful number, since it uses less digits than its factorization.

999715613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5915503 (or 5915490 counting only the distinct ones).

The product of its digits is 459270, while the sum is 50.

The square root of 999715613 is about 31618.2797286633. The cubic root of 999715613 is about 999.9051953457.

The spelling of 999715613 in words is "nine hundred ninety-nine million, seven hundred fifteen thousand, six hundred thirteen".