23690431 has 2 divisors, whose sum is σ = 23690432. Its totient is φ = 23690430.

The previous prime is 23690399. The next prime is 23690461. The reversal of 23690431 is 13409632.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23690431 - 2⁵ = 23690399 is a prime.

It is a super-2 number, since 2×23690431² = 1122473041931522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 23690431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23690461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11845215 + 11845216.

It is an arithmetic number, because the mean of its divisors is an integer number (11845216).

Almost surely, 2^23690431 is an apocalyptic number.

23690431 is a deficient number, since it is larger than the sum of its proper divisors (1).

23690431 is an equidigital number, since it uses as much as digits as its factorization.

23690431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 23690431 is about 4867.2816848833. The cubic root of 23690431 is about 287.2043327106.

The spelling of 23690431 in words is "twenty-three million, six hundred ninety thousand, four hundred thirty-one".