232609991 has 2 divisors, whose sum is σ = 232609992. Its totient is φ = 232609990.

The previous prime is 232609981. The next prime is 232609999. The reversal of 232609991 is 199906232.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 232609991 - 2¹⁸ = 232347847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (232609999) 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, 116304995 + 116304996.

It is an arithmetic number, because the mean of its divisors is an integer number (116304996).

Almost surely, 2^232609991 is an apocalyptic number.

232609991 is a deficient number, since it is larger than the sum of its proper divisors (1).

232609991 is an equidigital number, since it uses as much as digits as its factorization.

232609991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52488, while the sum is 41.

The square root of 232609991 is about 15251.5570024834. The cubic root of 232609991 is about 615.0014241931.

The spelling of 232609991 in words is "two hundred thirty-two million, six hundred nine thousand, nine hundred ninety-one".