77373813 has 24 divisors (see below), whose sum is σ = 116056864. Its totient is φ = 45793440.

The previous prime is 77373781. The next prime is 77373853. The reversal of 77373813 is 31837377.

It is a happy number.

It is not a de Polignac number, because 77373813 - 2⁵ = 77373781 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77373853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13131 + ... + 18087.

Almost surely, 2^77373813 is an apocalyptic number.

It is an amenable number.

77373813 is a deficient number, since it is larger than the sum of its proper divisors (38683051).

77373813 is a wasteful number, since it uses less digits than its factorization.

77373813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5025 (or 5014 counting only the distinct ones).

The product of its digits is 74088, while the sum is 39.

The square root of 77373813 is about 8796.2385711166. The cubic root of 77373813 is about 426.1194258392.

The spelling of 77373813 in words is "seventy-seven million, three hundred seventy-three thousand, eight hundred thirteen".