83712865 has 16 divisors (see below), whose sum is σ = 104002560. Its totient is φ = 64618560.

The previous prime is 83712859. The next prime is 83712869. The reversal of 83712865 is 56821738.

It is not a de Polignac number, because 83712865 - 2¹¹ = 83710817 is a prime.

It is not an unprimeable number, because it can be changed into a prime (83712869) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74931 + ... + 76039.

It is an arithmetic number, because the mean of its divisors is an integer number (6500160).

Almost surely, 2^83712865 is an apocalyptic number.

It is an amenable number.

83712865 is a deficient number, since it is larger than the sum of its proper divisors (20289695).

83712865 is a wasteful number, since it uses less digits than its factorization.

83712865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1632.

The product of its digits is 80640, while the sum is 40.

The square root of 83712865 is about 9149.4734821191. The cubic root of 83712865 is about 437.4523311328.

It can be divided in two parts, 8371 and 2865, that added together give a square (11236 = 106²).

The spelling of 83712865 in words is "eighty-three million, seven hundred twelve thousand, eight hundred sixty-five".