864669273 has 16 divisors (see below), whose sum is σ = 1242990336. Its totient is φ = 531498240.

The previous prime is 864669269. The next prime is 864669277. The reversal of 864669273 is 372966468.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (864669269) and next prime (864669277).

It is not a de Polignac number, because 864669273 - 2² = 864669269 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (864669277) 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, 23361 + ... + 47697.

It is an arithmetic number, because the mean of its divisors is an integer number (77686896).

Almost surely, 2^864669273 is an apocalyptic number.

It is an amenable number.

864669273 is a deficient number, since it is larger than the sum of its proper divisors (378321063).

864669273 is a wasteful number, since it uses less digits than its factorization.

864669273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25264.

The product of its digits is 2612736, while the sum is 51.

The square root of 864669273 is about 29405.2592744903. The cubic root of 864669273 is about 952.6864947137.

The spelling of 864669273 in words is "eight hundred sixty-four million, six hundred sixty-nine thousand, two hundred seventy-three".