82991975 has 12 divisors (see below), whose sum is σ = 112265880. Its totient is φ = 60357600.

The previous prime is 82991969. The next prime is 82992001. The reversal of 82991975 is 57919928.

It is a happy number.

It is not a de Polignac number, because 82991975 - 2⁶ = 82991911 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 150620 + ... + 151169.

It is an arithmetic number, because the mean of its divisors is an integer number (9355490).

Almost surely, 2^82991975 is an apocalyptic number.

82991975 is a deficient number, since it is larger than the sum of its proper divisors (29273905).

82991975 is a wasteful number, since it uses less digits than its factorization.

82991975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301810 (or 301805 counting only the distinct ones).

The product of its digits is 408240, while the sum is 50.

The square root of 82991975 is about 9109.9931394047. The cubic root of 82991975 is about 436.1930082116.

The spelling of 82991975 in words is "eighty-two million, nine hundred ninety-one thousand, nine hundred seventy-five".