864904197 has 4 divisors (see below), whose sum is σ = 1153205600. Its totient is φ = 576602796.

The previous prime is 864904127. The next prime is 864904211. The reversal of 864904197 is 791409468.

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 not a de Polignac number, because 864904197 - 2²⁰ = 863855621 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 (864904127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144150697 + ... + 144150702.

It is an arithmetic number, because the mean of its divisors is an integer number (288301400).

Almost surely, 2^864904197 is an apocalyptic number.

It is an amenable number.

864904197 is a deficient number, since it is larger than the sum of its proper divisors (288301403).

864904197 is a wasteful number, since it uses less digits than its factorization.

864904197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288301402.

The product of its (nonzero) digits is 435456, while the sum is 48.

The square root of 864904197 is about 29409.2535947446. The cubic root of 864904197 is about 952.7727661021.

The spelling of 864904197 in words is "eight hundred sixty-four million, nine hundred four thousand, one hundred ninety-seven".