465660989 has 2 divisors, whose sum is σ = 465660990. Its totient is φ = 465660988.

The previous prime is 465660983. The next prime is 465661057. The reversal of 465660989 is 989066564.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 459244900 + 6416089 = 21430^2 + 2533^2 .

It is a cyclic number.

It is not a de Polignac number, because 465660989 - 2⁸ = 465660733 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 465660989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (465660983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 232830494 + 232830495.

It is an arithmetic number, because the mean of its divisors is an integer number (232830495).

Almost surely, 2^465660989 is an apocalyptic number.

It is an amenable number.

465660989 is a deficient number, since it is larger than the sum of its proper divisors (1).

465660989 is an equidigital number, since it uses as much as digits as its factorization.

465660989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2799360, while the sum is 53.

The square root of 465660989 is about 21579.1795256446. The cubic root of 465660989 is about 775.0980043942.

The spelling of 465660989 in words is "four hundred sixty-five million, six hundred sixty thousand, nine hundred eighty-nine".