90432567997 has 2 divisors, whose sum is σ = 90432567998. Its totient is φ = 90432567996.

The previous prime is 90432567943. The next prime is 90432568019. The reversal of 90432567997 is 79976523409.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72819562201 + 17613005796 = 269851^2 + 132714^2 .

It is a cyclic number.

It is not a de Polignac number, because 90432567997 - 2²³ = 90424179389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90432567937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45216283998 + 45216283999.

It is an arithmetic number, because the mean of its divisors is an integer number (45216283999).

Almost surely, 2^90432567997 is an apocalyptic number.

It is an amenable number.

90432567997 is a deficient number, since it is larger than the sum of its proper divisors (1).

90432567997 is an equidigital number, since it uses as much as digits as its factorization.

90432567997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25719120, while the sum is 61.

The spelling of 90432567997 in words is "ninety billion, four hundred thirty-two million, five hundred sixty-seven thousand, nine hundred ninety-seven".