30920479 has 2 divisors, whose sum is σ = 30920480. Its totient is φ = 30920478.

The previous prime is 30920471. The next prime is 30920503. The reversal of 30920479 is 97402903.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 30920479 - 2³ = 30920471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30920471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15460239 + 15460240.

It is an arithmetic number, because the mean of its divisors is an integer number (15460240).

Almost surely, 2^30920479 is an apocalyptic number.

30920479 is a deficient number, since it is larger than the sum of its proper divisors (1).

30920479 is an equidigital number, since it uses as much as digits as its factorization.

30920479 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 30920479 is about 5560.6185806977. The cubic root of 30920479 is about 313.8692269211.

The spelling of 30920479 in words is "thirty million, nine hundred twenty thousand, four hundred seventy-nine".