83959252613 has 4 divisors (see below), whose sum is σ = 84069580908. Its totient is φ = 83848924320.

The previous prime is 83959252607. The next prime is 83959252661. The reversal of 83959252613 is 31625295938.

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 21719980129 + 62239272484 = 147377^2 + 249478^2 .

It is a cyclic number.

It is not a de Polignac number, because 83959252613 - 2⁶ = 83959252549 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 (83959252813) 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, 55163006 + ... + 55164527.

It is an arithmetic number, because the mean of its divisors is an integer number (21017395227).

Almost surely, 2^83959252613 is an apocalyptic number.

It is an amenable number.

83959252613 is a deficient number, since it is larger than the sum of its proper divisors (110328295).

83959252613 is a wasteful number, since it uses less digits than its factorization.

83959252613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110328294.

The product of its digits is 3499200, while the sum is 53.

The spelling of 83959252613 in words is "eighty-three billion, nine hundred fifty-nine million, two hundred fifty-two thousand, six hundred thirteen".