77693331 has 8 divisors (see below), whose sum is σ = 103631824. Its totient is φ = 51775200.

The previous prime is 77693327. The next prime is 77693359. The reversal of 77693331 is 13339677.

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

It is not a de Polignac number, because 77693331 - 2² = 77693327 is a prime.

It is a super-2 number, since 2×77693331² = 12072507363751122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 77693331.

It is not an unprimeable number, because it can be changed into a prime (77693431) 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, 12681 + ... + 17781.

It is an arithmetic number, because the mean of its divisors is an integer number (12953978).

Almost surely, 2^77693331 is an apocalyptic number.

77693331 is a deficient number, since it is larger than the sum of its proper divisors (25938493).

77693331 is a wasteful number, since it uses less digits than its factorization.

77693331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10181.

The product of its digits is 71442, while the sum is 39.

The square root of 77693331 is about 8814.3820543473. The cubic root of 77693331 is about 426.7051788832.

The spelling of 77693331 in words is "seventy-seven million, six hundred ninety-three thousand, three hundred thirty-one".