30309697139 has 2 divisors, whose sum is σ = 30309697140. Its totient is φ = 30309697138.

The previous prime is 30309697133. The next prime is 30309697147. The reversal of 30309697139 is 93179690303.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30309697139 is a prime.

It is not a weakly prime, because it can be changed into another prime (30309697133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15154848569 + 15154848570.

It is an arithmetic number, because the mean of its divisors is an integer number (15154848570).

Almost surely, 2^30309697139 is an apocalyptic number.

30309697139 is a deficient number, since it is larger than the sum of its proper divisors (1).

30309697139 is an equidigital number, since it uses as much as digits as its factorization.

30309697139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 826686, while the sum is 50.

The spelling of 30309697139 in words is "thirty billion, three hundred nine million, six hundred ninety-seven thousand, one hundred thirty-nine".