23032991 has 2 divisors, whose sum is σ = 23032992. Its totient is φ = 23032990.

The previous prime is 23032987. The next prime is 23033027. The reversal of 23032991 is 19923032.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23032991 - 2² = 23032987 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23032901) 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, 11516495 + 11516496.

It is an arithmetic number, because the mean of its divisors is an integer number (11516496).

Almost surely, 2^23032991 is an apocalyptic number.

23032991 is a deficient number, since it is larger than the sum of its proper divisors (1).

23032991 is an equidigital number, since it uses as much as digits as its factorization.

23032991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 29.

The square root of 23032991 is about 4799.2698402986. The cubic root of 23032991 is about 284.5226069592.

The spelling of 23032991 in words is "twenty-three million, thirty-two thousand, nine hundred ninety-one".