465801991 has 16 divisors (see below), whose sum is σ = 488649600. Its totient is φ = 443566368.

The previous prime is 465801983. The next prime is 465801997. The reversal of 465801991 is 199108564.

It is a cyclic number.

It is not a de Polignac number, because 465801991 - 2³ = 465801983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (465801997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 827076 + ... + 827638.

It is an arithmetic number, because the mean of its divisors is an integer number (30540600).

Almost surely, 2^465801991 is an apocalyptic number.

465801991 is a deficient number, since it is larger than the sum of its proper divisors (22847609).

465801991 is a wasteful number, since it uses less digits than its factorization.

465801991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1038.

The product of its (nonzero) digits is 77760, while the sum is 43.

The square root of 465801991 is about 21582.4463627273. The cubic root of 465801991 is about 775.1762296426.

The spelling of 465801991 in words is "four hundred sixty-five million, eight hundred one thousand, nine hundred ninety-one".