71993975 has 6 divisors (see below), whose sum is σ = 89272560. Its totient is φ = 57595160.

The previous prime is 71993959. The next prime is 71993993. The reversal of 71993975 is 57939917.

It is a happy number.

It is not a de Polignac number, because 71993975 - 2⁴ = 71993959 is a prime.

It is a congruent number.

It is an unprimeable number.

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, 1439855 + ... + 1439904.

It is an arithmetic number, because the mean of its divisors is an integer number (14878760).

Almost surely, 2^71993975 is an apocalyptic number.

71993975 is a deficient number, since it is larger than the sum of its proper divisors (17278585).

71993975 is a wasteful number, since it uses less digits than its factorization.

71993975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2879769 (or 2879764 counting only the distinct ones).

The product of its digits is 535815, while the sum is 50.

The square root of 71993975 is about 8484.9263402813. The cubic root of 71993975 is about 416.0051601154.

The spelling of 71993975 in words is "seventy-one million, nine hundred ninety-three thousand, nine hundred seventy-five".