30931007249 has 2 divisors, whose sum is σ = 30931007250. Its totient is φ = 30931007248.

The previous prime is 30931007227. The next prime is 30931007257. The reversal of 30931007249 is 94270013903.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30508910224 + 422097025 = 174668^2 + 20545^2 .

It is a cyclic number.

It is not a de Polignac number, because 30931007249 - 2²⁴ = 30914230033 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (30931007209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15465503624 + 15465503625.

It is an arithmetic number, because the mean of its divisors is an integer number (15465503625).

Almost surely, 2^30931007249 is an apocalyptic number.

It is an amenable number.

30931007249 is a deficient number, since it is larger than the sum of its proper divisors (1).

30931007249 is an equidigital number, since it uses as much as digits as its factorization.

30931007249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 38.

The spelling of 30931007249 in words is "thirty billion, nine hundred thirty-one million, seven thousand, two hundred forty-nine".