77813883 has 12 divisors (see below), whose sum is σ = 128454768. Its totient is φ = 44465040.

The previous prime is 77813881. The next prime is 77813887. The reversal of 77813883 is 38831877.

It is not a de Polignac number, because 77813883 - 2¹ = 77813881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77813881) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 617508 + ... + 617633.

It is an arithmetic number, because the mean of its divisors is an integer number (10704564).

Almost surely, 2^77813883 is an apocalyptic number.

77813883 is a deficient number, since it is larger than the sum of its proper divisors (50640885).

77813883 is a wasteful number, since it uses less digits than its factorization.

77813883 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1235154 (or 1235151 counting only the distinct ones).

The product of its digits is 225792, while the sum is 45.

The square root of 77813883 is about 8821.2177730742. The cubic root of 77813883 is about 426.9257622951.

It can be divided in two parts, 7781 and 3883, that added together give a square (11664 = 108²).

The spelling of 77813883 in words is "seventy-seven million, eight hundred thirteen thousand, eight hundred eighty-three".