76705631 has 8 divisors (see below), whose sum is σ = 77936544. Its totient is φ = 75479040.

The previous prime is 76705627. The next prime is 76705633. The reversal of 76705631 is 13650767.

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 76705631 - 2² = 76705627 is a prime.

It is a super-2 number, since 2×76705631² = 11767507654216322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 76705591 and 76705600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76705633) 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, 65951 + ... + 67103.

It is an arithmetic number, because the mean of its divisors is an integer number (9742068).

Almost surely, 2^76705631 is an apocalyptic number.

76705631 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

76705631 is a deficient number, since it is larger than the sum of its proper divisors (1230913).

76705631 is a wasteful number, since it uses less digits than its factorization.

76705631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2161.

The product of its (nonzero) digits is 26460, while the sum is 35.

The square root of 76705631 is about 8758.1750953038. The cubic root of 76705631 is about 424.8892555743.

The spelling of 76705631 in words is "seventy-six million, seven hundred five thousand, six hundred thirty-one".