77919193 has 16 divisors (see below), whose sum is σ = 89413632. Its totient is φ = 67210000.

The previous prime is 77919187. The next prime is 77919203. The reversal of 77919193 is 39191977.

It is not a de Polignac number, because 77919193 - 2²¹ = 75822041 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77919293) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31968 + ... + 34318.

It is an arithmetic number, because the mean of its divisors is an integer number (5588352).

Almost surely, 2^77919193 is an apocalyptic number.

It is an amenable number.

77919193 is a deficient number, since it is larger than the sum of its proper divisors (11494439).

77919193 is a wasteful number, since it uses less digits than its factorization.

77919193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2516.

The product of its digits is 107163, while the sum is 46.

The square root of 77919193 is about 8827.1848853414. The cubic root of 77919193 is about 427.1182698675.

The spelling of 77919193 in words is "seventy-seven million, nine hundred nineteen thousand, one hundred ninety-three".