3681879613 has 2 divisors, whose sum is σ = 3681879614. Its totient is φ = 3681879612.

The previous prime is 3681879599. The next prime is 3681879623. The reversal of 3681879613 is 3169781863.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3615977689 + 65901924 = 60133^2 + 8118^2 .

It is a cyclic number.

It is not a de Polignac number, because 3681879613 - 2¹³ = 3681871421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3681879623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1840939806 + 1840939807.

It is an arithmetic number, because the mean of its divisors is an integer number (1840939807).

Almost surely, 2^3681879613 is an apocalyptic number.

It is an amenable number.

3681879613 is a deficient number, since it is larger than the sum of its proper divisors (1).

3681879613 is an equidigital number, since it uses as much as digits as its factorization.

3681879613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1306368, while the sum is 52.

The square root of 3681879613 is about 60678.4938260666. The cubic root of 3681879613 is about 1544.1513355661.

The spelling of 3681879613 in words is "three billion, six hundred eighty-one million, eight hundred seventy-nine thousand, six hundred thirteen".