30819206939 has 2 divisors, whose sum is σ = 30819206940. Its totient is φ = 30819206938.

The previous prime is 30819206909. The next prime is 30819206953. The reversal of 30819206939 is 93960291803.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30819206939 is a prime.

It is not a weakly prime, because it can be changed into another prime (30819206909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15409603469 + 15409603470.

It is an arithmetic number, because the mean of its divisors is an integer number (15409603470).

Almost surely, 2^30819206939 is an apocalyptic number.

30819206939 is a deficient number, since it is larger than the sum of its proper divisors (1).

30819206939 is an equidigital number, since it uses as much as digits as its factorization.

30819206939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 629856, while the sum is 50.

The spelling of 30819206939 in words is "thirty billion, eight hundred nineteen million, two hundred six thousand, nine hundred thirty-nine".