3640981087 has 2 divisors, whose sum is σ = 3640981088. Its totient is φ = 3640981086.

The previous prime is 3640981079. The next prime is 3640981139. The reversal of 3640981087 is 7801890463.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3640981087 - 2³ = 3640981079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3640981187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1820490543 + 1820490544.

It is an arithmetic number, because the mean of its divisors is an integer number (1820490544).

Almost surely, 2^3640981087 is an apocalyptic number.

3640981087 is a deficient number, since it is larger than the sum of its proper divisors (1).

3640981087 is an equidigital number, since it uses as much as digits as its factorization.

3640981087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304, while the sum is 46.

The square root of 3640981087 is about 60340.5426475434. The cubic root of 3640981087 is about 1538.4125271655.

The spelling of 3640981087 in words is "three billion, six hundred forty million, nine hundred eighty-one thousand, eighty-seven".