465139391 has 4 divisors (see below), whose sum is σ = 467828232. Its totient is φ = 462450552.

The previous prime is 465139351. The next prime is 465139403. The reversal of 465139391 is 193931564.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 465139391 - 2²² = 460945087 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 (465139331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1344161 + ... + 1344506.

It is an arithmetic number, because the mean of its divisors is an integer number (116957058).

Almost surely, 2^465139391 is an apocalyptic number.

465139391 is a deficient number, since it is larger than the sum of its proper divisors (2688841).

465139391 is a wasteful number, since it uses less digits than its factorization.

465139391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2688840.

The product of its digits is 87480, while the sum is 41.

The square root of 465139391 is about 21567.0904620906. The cubic root of 465139391 is about 774.8084943401.

The spelling of 465139391 in words is "four hundred sixty-five million, one hundred thirty-nine thousand, three hundred ninety-one".