78671975 has 6 divisors (see below), whose sum is σ = 97553280. Its totient is φ = 62937560.

The previous prime is 78671969. The next prime is 78672007. The reversal of 78671975 is 57917687.

It is not a de Polignac number, because 78671975 - 2⁴ = 78671959 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1573415 + ... + 1573464.

It is an arithmetic number, because the mean of its divisors is an integer number (16258880).

Almost surely, 2^78671975 is an apocalyptic number.

78671975 is a deficient number, since it is larger than the sum of its proper divisors (18881305).

78671975 is a wasteful number, since it uses less digits than its factorization.

78671975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3146889 (or 3146884 counting only the distinct ones).

The product of its digits is 740880, while the sum is 50.

The square root of 78671975 is about 8869.7223744602. The cubic root of 78671975 is about 428.4893357312.

The spelling of 78671975 in words is "seventy-eight million, six hundred seventy-one thousand, nine hundred seventy-five".