432540991 has 2 divisors, whose sum is σ = 432540992. Its totient is φ = 432540990.

The previous prime is 432540961. The next prime is 432541033. The reversal of 432540991 is 199045234.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 432540991 - 2⁷ = 432540863 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 432540991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (432540931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 216270495 + 216270496.

It is an arithmetic number, because the mean of its divisors is an integer number (216270496).

Almost surely, 2^432540991 is an apocalyptic number.

432540991 is a deficient number, since it is larger than the sum of its proper divisors (1).

432540991 is an equidigital number, since it uses as much as digits as its factorization.

432540991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 432540991 is about 20797.6198397797. The cubic root of 432540991 is about 756.2680566142.

The spelling of 432540991 in words is "four hundred thirty-two million, five hundred forty thousand, nine hundred ninety-one".