3685784131 has 2 divisors, whose sum is σ = 3685784132. Its totient is φ = 3685784130.

The previous prime is 3685784117. The next prime is 3685784147. The reversal of 3685784131 is 1314875863.

3685784131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3685784131 - 2²⁵ = 3652229699 is a prime.

It is a super-2 number, since 2×3685784131² = 27170009320662850322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3685724131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1842892065 + 1842892066.

It is an arithmetic number, because the mean of its divisors is an integer number (1842892066).

Almost surely, 2^3685784131 is an apocalyptic number.

3685784131 is a deficient number, since it is larger than the sum of its proper divisors (1).

3685784131 is an equidigital number, since it uses as much as digits as its factorization.

3685784131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 483840, while the sum is 46.

The square root of 3685784131 is about 60710.6591217720. The cubic root of 3685784131 is about 1544.6969841048.

The spelling of 3685784131 in words is "three billion, six hundred eighty-five million, seven hundred eighty-four thousand, one hundred thirty-one".