78791375 has 16 divisors (see below), whose sum is σ = 105897792. Its totient is φ = 58183200.

The previous prime is 78791371. The next prime is 78791407. The reversal of 78791375 is 57319787.

It is not a de Polignac number, because 78791375 - 2² = 78791371 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78791371) 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 15 ways as a sum of consecutive naturals, for example, 22619 + ... + 25868.

It is an arithmetic number, because the mean of its divisors is an integer number (6618612).

Almost surely, 2^78791375 is an apocalyptic number.

78791375 is a deficient number, since it is larger than the sum of its proper divisors (27106417).

78791375 is a wasteful number, since it uses less digits than its factorization.

78791375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48515 (or 48505 counting only the distinct ones).

The product of its digits is 370440, while the sum is 47.

The square root of 78791375 is about 8876.4505856789. The cubic root of 78791375 is about 428.7059980853.

The spelling of 78791375 in words is "seventy-eight million, seven hundred ninety-one thousand, three hundred seventy-five".