23430391 has 2 divisors, whose sum is σ = 23430392. Its totient is φ = 23430390.

The previous prime is 23430377. The next prime is 23430397. The reversal of 23430391 is 19303432.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23430391 - 2⁷ = 23430263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23430397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11715195 + 11715196.

It is an arithmetic number, because the mean of its divisors is an integer number (11715196).

Almost surely, 2^23430391 is an apocalyptic number.

23430391 is a deficient number, since it is larger than the sum of its proper divisors (1).

23430391 is an equidigital number, since it uses as much as digits as its factorization.

23430391 is an evil number, because the sum of its binary digits is even.

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

The square root of 23430391 is about 4840.4949127130. The cubic root of 23430391 is about 286.1496234065.

It can be divided in two parts, 234 and 30391, that added together give a square (30625 = 175²).

The spelling of 23430391 in words is "twenty-three million, four hundred thirty thousand, three hundred ninety-one".