83979757 has 4 divisors (see below), whose sum is σ = 84037500. Its totient is φ = 83922016.

The previous prime is 83979703. The next prime is 83979761. The reversal of 83979757 is 75797938.

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

It can be written as a sum of positive squares in 2 ways, for example, as 75794436 + 8185321 = 8706^2 + 2861^2 .

It is a cyclic number.

It is not a de Polignac number, because 83979757 - 2¹⁹ = 83455469 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 83979698 and 83979707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83979557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26632 + ... + 29617.

It is an arithmetic number, because the mean of its divisors is an integer number (21009375).

Almost surely, 2^83979757 is an apocalyptic number.

It is an amenable number.

83979757 is a deficient number, since it is larger than the sum of its proper divisors (57743).

83979757 is a wasteful number, since it uses less digits than its factorization.

83979757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57742.

The product of its digits is 3333960, while the sum is 55.

The square root of 83979757 is about 9164.0469771821. The cubic root of 83979757 is about 437.9167307632.

The spelling of 83979757 in words is "eighty-three million, nine hundred seventy-nine thousand, seven hundred fifty-seven".