77039231 has 8 divisors (see below), whose sum is σ = 77685360. Its totient is φ = 76396032.

The previous prime is 77039197. The next prime is 77039233. The reversal of 77039231 is 13293077.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 77039231 - 2¹⁰ = 77038207 is a prime.

It is a super-2 number, since 2×77039231² = 11870086226142722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77039233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108305 + ... + 109013.

It is an arithmetic number, because the mean of its divisors is an integer number (9710670).

Almost surely, 2^77039231 is an apocalyptic number.

77039231 is a deficient number, since it is larger than the sum of its proper divisors (646129).

77039231 is a wasteful number, since it uses less digits than its factorization.

77039231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1465.

The product of its (nonzero) digits is 7938, while the sum is 32.

The square root of 77039231 is about 8777.1994964225. The cubic root of 77039231 is about 425.5043258729.

The spelling of 77039231 in words is "seventy-seven million, thirty-nine thousand, two hundred thirty-one".