77706231 has 8 divisors (see below), whose sum is σ = 103655664. Its totient is φ = 51780480.

The previous prime is 77706229. The next prime is 77706241. The reversal of 77706231 is 13260777.

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

It is not a de Polignac number, because 77706231 - 2¹ = 77706229 is a prime.

It is a super-2 number, since 2×77706231² = 12076516672450722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 77706192 and 77706201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77706221) 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, 4221 + ... + 13161.

It is an arithmetic number, because the mean of its divisors is an integer number (12956958).

Almost surely, 2^77706231 is an apocalyptic number.

77706231 is a deficient number, since it is larger than the sum of its proper divisors (25949433).

77706231 is a wasteful number, since it uses less digits than its factorization.

77706231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11841.

The product of its (nonzero) digits is 12348, while the sum is 33.

The square root of 77706231 is about 8815.1137825895. The cubic root of 77706231 is about 426.7287939181.

The spelling of 77706231 in words is "seventy-seven million, seven hundred six thousand, two hundred thirty-one".