999712613 has 2 divisors, whose sum is σ = 999712614. Its totient is φ = 999712612.

The previous prime is 999712577. The next prime is 999712619. The reversal of 999712613 is 316217999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 756415009 + 243297604 = 27503^2 + 15598^2 .

It is a cyclic number.

It is not a de Polignac number, because 999712613 - 2¹⁸ = 999450469 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999712619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499856306 + 499856307.

It is an arithmetic number, because the mean of its divisors is an integer number (499856307).

Almost surely, 2^999712613 is an apocalyptic number.

It is an amenable number.

999712613 is a deficient number, since it is larger than the sum of its proper divisors (1).

999712613 is an equidigital number, since it uses as much as digits as its factorization.

999712613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 183708, while the sum is 47.

The square root of 999712613 is about 31618.2322877165. The cubic root of 999712613 is about 999.9041951551.

The spelling of 999712613 in words is "nine hundred ninety-nine million, seven hundred twelve thousand, six hundred thirteen".