30390923 has 2 divisors, whose sum is σ = 30390924. Its totient is φ = 30390922.

The previous prime is 30390907. The next prime is 30390931. The reversal of 30390923 is 32909303.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 30390923 - 2⁴ = 30390907 is a prime.

It is not a weakly prime, because it can be changed into another prime (30390953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15195461 + 15195462.

It is an arithmetic number, because the mean of its divisors is an integer number (15195462).

Almost surely, 2^30390923 is an apocalyptic number.

30390923 is a deficient number, since it is larger than the sum of its proper divisors (1).

30390923 is an equidigital number, since it uses as much as digits as its factorization.

30390923 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4374, while the sum is 29.

The square root of 30390923 is about 5512.7962958919. The cubic root of 30390923 is about 312.0670843860.

It can be divided in two parts, 30390 and 923, that added together give a palindrome (31313).

The spelling of 30390923 in words is "thirty million, three hundred ninety thousand, nine hundred twenty-three".