3640981139 has 2 divisors, whose sum is σ = 3640981140. Its totient is φ = 3640981138.

The previous prime is 3640981087. The next prime is 3640981163. The reversal of 3640981139 is 9311890463.

3640981139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3640981139 - 2²⁴ = 3624203923 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3640981139.

It is not a weakly prime, because it can be changed into another prime (3640981199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1820490569 + 1820490570.

It is an arithmetic number, because the mean of its divisors is an integer number (1820490570).

Almost surely, 2^3640981139 is an apocalyptic number.

3640981139 is a deficient number, since it is larger than the sum of its proper divisors (1).

3640981139 is an equidigital number, since it uses as much as digits as its factorization.

3640981139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 139968, while the sum is 44.

The square root of 3640981139 is about 60340.5430784311. The cubic root of 3640981139 is about 1538.4125344893.

The spelling of 3640981139 in words is "three billion, six hundred forty million, nine hundred eighty-one thousand, one hundred thirty-nine".