77193923 has 12 divisors (see below), whose sum is σ = 83147880. Its totient is φ = 71638272.

The previous prime is 77193899. The next prime is 77193931. The reversal of 77193923 is 32939177.

It is a de Polignac number, because none of the positive numbers 2^k-77193923 is a prime.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77193943) 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 11 ways as a sum of consecutive naturals, for example, 19268 + ... + 22926.

It is an arithmetic number, because the mean of its divisors is an integer number (6928990).

Almost surely, 2^77193923 is an apocalyptic number.

77193923 is a gapful number since it is divisible by the number (73) formed by its first and last digit.

77193923 is a deficient number, since it is larger than the sum of its proper divisors (5953957).

77193923 is a wasteful number, since it uses less digits than its factorization.

77193923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3766 (or 3749 counting only the distinct ones).

The product of its digits is 71442, while the sum is 41.

The square root of 77193923 is about 8786.0072274043. The cubic root of 77193923 is about 425.7889345814.

The spelling of 77193923 in words is "seventy-seven million, one hundred ninety-three thousand, nine hundred twenty-three".