83712913 has 4 divisors (see below), whose sum is σ = 88637220. Its totient is φ = 78788608.

The previous prime is 83712911. The next prime is 83712931. The reversal of 83712913 is 31921738.

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 48274704 + 35438209 = 6948^2 + 5953^2 .

It is not a de Polignac number, because 83712913 - 2¹ = 83712911 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83712911) 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, 2462128 + ... + 2462161.

It is an arithmetic number, because the mean of its divisors is an integer number (22159305).

Almost surely, 2^83712913 is an apocalyptic number.

It is an amenable number.

83712913 is a deficient number, since it is larger than the sum of its proper divisors (4924307).

83712913 is a wasteful number, since it uses less digits than its factorization.

83712913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4924306.

The product of its digits is 9072, while the sum is 34.

The square root of 83712913 is about 9149.4761052205. The cubic root of 83712913 is about 437.4524147429.

The spelling of 83712913 in words is "eighty-three million, seven hundred twelve thousand, nine hundred thirteen".