77383917 has 30 divisors (see below), whose sum is σ = 125196522. Its totient is φ = 47612448.

The previous prime is 77383913. The next prime is 77383939. The reversal of 77383917 is 71938377.

It can be written as a sum of positive squares in 3 ways, for example, as 1798281 + 75585636 = 1341^2 + 8694^2 .

It is not a de Polignac number, because 77383917 - 2² = 77383913 is a prime.

It is a super-2 number, since 2×77383917² = 11976541220525778, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77383913) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 10863 + ... + 16515.

Almost surely, 2^77383917 is an apocalyptic number.

It is an amenable number.

77383917 is a deficient number, since it is larger than the sum of its proper divisors (47812605).

77383917 is a wasteful number, since it uses less digits than its factorization.

77383917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5691 (or 5669 counting only the distinct ones).

The product of its digits is 222264, while the sum is 45.

The square root of 77383917 is about 8796.8128887683. The cubic root of 77383917 is about 426.1379735584.

The spelling of 77383917 in words is "seventy-seven million, three hundred eighty-three thousand, nine hundred seventeen".