77923799 has 6 divisors (see below), whose sum is σ = 78387120. Its totient is φ = 77461860.

The previous prime is 77923763. The next prime is 77923831. The reversal of 77923799 is 99732977.

It is not a de Polignac number, because 77923799 - 2⁸ = 77923543 is a prime.

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 77923799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77923709) 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 5 ways as a sum of consecutive naturals, for example, 136184 + ... + 136754.

It is an arithmetic number, because the mean of its divisors is an integer number (13064520).

Almost surely, 2^77923799 is an apocalyptic number.

77923799 is a deficient number, since it is larger than the sum of its proper divisors (463321).

77923799 is an frugal number, since it uses more digits than its factorization.

77923799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1381 (or 810 counting only the distinct ones).

The product of its digits is 1500282, while the sum is 53.

The square root of 77923799 is about 8827.4457800657. The cubic root of 77923799 is about 427.1266857144.

The spelling of 77923799 in words is "seventy-seven million, nine hundred twenty-three thousand, seven hundred ninety-nine".