76864869 has 20 divisors (see below), whose sum is σ = 115429644. Its totient is φ = 50972544.

The previous prime is 76864831. The next prime is 76864901. The reversal of 76864869 is 96846867.

It can be written as a sum of positive squares in 2 ways, for example, as 44715969 + 32148900 = 6687^2 + 5670^2 .

It is not a de Polignac number, because 76864869 - 2¹⁹ = 76340581 is a prime.

It is a super-2 number, since 2×76864869² = 11816416172774322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76864169) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 13549 + ... + 18365.

Almost surely, 2^76864869 is an apocalyptic number.

It is an amenable number.

76864869 is a deficient number, since it is larger than the sum of its proper divisors (38564775).

76864869 is a wasteful number, since it uses less digits than its factorization.

76864869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5026 (or 5017 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 54.

The square root of 76864869 is about 8767.2612029071. The cubic root of 76864869 is about 425.1830703807.

The spelling of 76864869 in words is "seventy-six million, eight hundred sixty-four thousand, eight hundred sixty-nine".