30992013 has 12 divisors (see below), whose sum is σ = 48209980. Its totient is φ = 19071936.

The previous prime is 30992011. The next prime is 30992053. The reversal of 30992013 is 31029903.

It can be written as a sum of positive squares in 2 ways, for example, as 5560164 + 25431849 = 2358^2 + 5043^2 .

It is not a de Polignac number, because 30992013 - 2¹ = 30992011 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30992011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 132328 + ... + 132561.

Almost surely, 2^30992013 is an apocalyptic number.

It is an amenable number.

30992013 is a deficient number, since it is larger than the sum of its proper divisors (17217967).

30992013 is a wasteful number, since it uses less digits than its factorization.

30992013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264908 (or 264905 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 27.

The square root of 30992013 is about 5567.0470628512. The cubic root of 30992013 is about 314.1110842043. Note that the first 3 decimals are identical.

The spelling of 30992013 in words is "thirty million, nine hundred ninety-two thousand, thirteen".