831809465 has 16 divisors (see below), whose sum is σ = 1038804480. Its totient is φ = 638635200.

The previous prime is 831809423. The next prime is 831809479. The reversal of 831809465 is 564908138.

It is not a de Polignac number, because 831809465 - 2¹⁰ = 831808441 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7040 + ... + 41390.

It is an arithmetic number, because the mean of its divisors is an integer number (64925280).

Almost surely, 2^831809465 is an apocalyptic number.

It is an amenable number.

831809465 is a deficient number, since it is larger than the sum of its proper divisors (206995015).

831809465 is a wasteful number, since it uses less digits than its factorization.

831809465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34552.

The product of its (nonzero) digits is 207360, while the sum is 44.

The square root of 831809465 is about 28841.1072082887. The cubic root of 831809465 is about 940.4620728834.

The spelling of 831809465 in words is "eight hundred thirty-one million, eight hundred nine thousand, four hundred sixty-five".