77868231 has 16 divisors (see below), whose sum is σ = 119019264. Its totient is φ = 44360064.

The previous prime is 77868229. The next prime is 77868233. The reversal of 77868231 is 13286877.

It is an interprime number because it is at equal distance from previous prime (77868229) and next prime (77868233).

It is not a de Polignac number, because 77868231 - 2¹ = 77868229 is a prime.

It is a super-2 number, since 2×77868231² = 12126922798138722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77868233) 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, 1576 + ... + 12578.

It is an arithmetic number, because the mean of its divisors is an integer number (7438704).

Almost surely, 2^77868231 is an apocalyptic number.

77868231 is a deficient number, since it is larger than the sum of its proper divisors (41151033).

77868231 is a wasteful number, since it uses less digits than its factorization.

77868231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11350.

The product of its digits is 112896, while the sum is 42.

The square root of 77868231 is about 8824.2977624285. The cubic root of 77868231 is about 427.0251325733.

The spelling of 77868231 in words is "seventy-seven million, eight hundred sixty-eight thousand, two hundred thirty-one".