83975879 has 4 divisors (see below), whose sum is σ = 90435576. Its totient is φ = 77516184.

The previous prime is 83975873. The next prime is 83975893. The reversal of 83975879 is 97857938.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 83975879 - 2⁴ = 83975863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83975873) 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 3 ways as a sum of consecutive naturals, for example, 3229829 + ... + 3229854.

It is an arithmetic number, because the mean of its divisors is an integer number (22608894).

Almost surely, 2^83975879 is an apocalyptic number.

83975879 is a deficient number, since it is larger than the sum of its proper divisors (6459697).

83975879 is a wasteful number, since it uses less digits than its factorization.

83975879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6459696.

The product of its digits is 3810240, while the sum is 56.

The square root of 83975879 is about 9163.8353869982. The cubic root of 83975879 is about 437.9099899831.

The spelling of 83975879 in words is "eighty-three million, nine hundred seventy-five thousand, eight hundred seventy-nine".