30939407 has 2 divisors, whose sum is σ = 30939408. Its totient is φ = 30939406.

The previous prime is 30939373. The next prime is 30939409. The reversal of 30939407 is 70493903.

It is a strong prime.

It is an emirp because it is prime and its reverse (70493903) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30939407 - 2⁶ = 30939343 is a prime.

Together with 30939409, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30939409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15469703 + 15469704.

It is an arithmetic number, because the mean of its divisors is an integer number (15469704).

Almost surely, 2^30939407 is an apocalyptic number.

30939407 is a deficient number, since it is larger than the sum of its proper divisors (1).

30939407 is an equidigital number, since it uses as much as digits as its factorization.

30939407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20412, while the sum is 35.

The square root of 30939407 is about 5562.3202892318. The cubic root of 30939407 is about 313.9332589702.

The spelling of 30939407 in words is "thirty million, nine hundred thirty-nine thousand, four hundred seven".