816464297 has 4 divisors (see below), whose sum is σ = 890688336. Its totient is φ = 742240260.

The previous prime is 816464251. The next prime is 816464309. The reversal of 816464297 is 792464618.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 816464297 - 2⁸ = 816464041 is a prime.

It is a super-2 number, since 2×816464297² = 1333227896551408418, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (816461297) 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, 37112003 + ... + 37112024.

It is an arithmetic number, because the mean of its divisors is an integer number (222672084).

Almost surely, 2^816464297 is an apocalyptic number.

It is an amenable number.

816464297 is a deficient number, since it is larger than the sum of its proper divisors (74224039).

816464297 is a wasteful number, since it uses less digits than its factorization.

816464297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74224038.

The product of its digits is 580608, while the sum is 47.

The square root of 816464297 is about 28573.8393815042. The cubic root of 816464297 is about 934.6429463977.

The spelling of 816464297 in words is "eight hundred sixteen million, four hundred sixty-four thousand, two hundred ninety-seven".