76685393 has 4 divisors (see below), whose sum is σ = 76721460. Its totient is φ = 76649328.

The previous prime is 76685369. The next prime is 76685407. The reversal of 76685393 is 39358667.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39358667 = 1279 ⋅30773.

It can be written as a sum of positive squares in 2 ways, for example, as 14227984 + 62457409 = 3772^2 + 7903^2 .

It is a cyclic number.

It is not a de Polignac number, because 76685393 - 2⁸ = 76685137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76685333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14630 + ... + 19167.

It is an arithmetic number, because the mean of its divisors is an integer number (19180365).

Almost surely, 2^76685393 is an apocalyptic number.

It is an amenable number.

76685393 is a deficient number, since it is larger than the sum of its proper divisors (36067).

76685393 is a wasteful number, since it uses less digits than its factorization.

76685393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36066.

The product of its digits is 816480, while the sum is 47.

The square root of 76685393 is about 8757.0196414077. The cubic root of 76685393 is about 424.8518847190.

The spelling of 76685393 in words is "seventy-six million, six hundred eighty-five thousand, three hundred ninety-three".