864894129 has 32 divisors (see below), whose sum is σ = 1297112064. Its totient is φ = 508006080.

The previous prime is 864894119. The next prime is 864894187. The reversal of 864894129 is 921498468.

It is not a de Polignac number, because 864894129 - 2¹⁶ = 864828593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (864894109) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 344292 + ... + 346794.

It is an arithmetic number, because the mean of its divisors is an integer number (40534752).

Almost surely, 2^864894129 is an apocalyptic number.

It is an amenable number.

864894129 is a deficient number, since it is larger than the sum of its proper divisors (432217935).

864894129 is a wasteful number, since it uses less digits than its factorization.

864894129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2837.

The product of its digits is 995328, while the sum is 51.

The square root of 864894129 is about 29409.0824236323. The cubic root of 864894129 is about 952.7690691403.

The spelling of 864894129 in words is "eight hundred sixty-four million, eight hundred ninety-four thousand, one hundred twenty-nine".