232720391 has 2 divisors, whose sum is σ = 232720392. Its totient is φ = 232720390.

The previous prime is 232720349. The next prime is 232720409. The reversal of 232720391 is 193027232.

232720391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-232720391 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (232720291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 116360195 + 116360196.

It is an arithmetic number, because the mean of its divisors is an integer number (116360196).

Almost surely, 2^232720391 is an apocalyptic number.

232720391 is a deficient number, since it is larger than the sum of its proper divisors (1).

232720391 is an equidigital number, since it uses as much as digits as its factorization.

232720391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 232720391 is about 15255.1758757479. The cubic root of 232720391 is about 615.0987049365.

The spelling of 232720391 in words is "two hundred thirty-two million, seven hundred twenty thousand, three hundred ninety-one".