30920623 has 2 divisors, whose sum is σ = 30920624. Its totient is φ = 30920622.

The previous prime is 30920599. The next prime is 30920633. The reversal of 30920623 is 32602903.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 30920623 - 2²¹ = 28823471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30920633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15460311 + 15460312.

It is an arithmetic number, because the mean of its divisors is an integer number (15460312).

Almost surely, 2^30920623 is an apocalyptic number.

30920623 is a deficient number, since it is larger than the sum of its proper divisors (1).

30920623 is an equidigital number, since it uses as much as digits as its factorization.

30920623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 25.

The square root of 30920623 is about 5560.6315288823. The cubic root of 30920623 is about 313.8697141612.

The spelling of 30920623 in words is "thirty million, nine hundred twenty thousand, six hundred twenty-three".