83765971 has 4 divisors (see below), whose sum is σ = 83785072. Its totient is φ = 83746872.

The previous prime is 83765963. The next prime is 83765989. The reversal of 83765971 is 17956738.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17956738 = 2 ⋅8978369.

It is a cyclic number.

It is not a de Polignac number, because 83765971 - 2³ = 83765963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83765371) 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, 685 + ... + 12961.

It is an arithmetic number, because the mean of its divisors is an integer number (20946268).

Almost surely, 2^83765971 is an apocalyptic number.

83765971 is a deficient number, since it is larger than the sum of its proper divisors (19101).

83765971 is a wasteful number, since it uses less digits than its factorization.

83765971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19100.

The product of its digits is 317520, while the sum is 46.

The square root of 83765971 is about 9152.3751562095. The cubic root of 83765971 is about 437.5448156540.

The spelling of 83765971 in words is "eighty-three million, seven hundred sixty-five thousand, nine hundred seventy-one".