3685140491 has 2 divisors, whose sum is σ = 3685140492. Its totient is φ = 3685140490.

The previous prime is 3685140451. The next prime is 3685140527. The reversal of 3685140491 is 1940415863.

3685140491 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 an emirp because it is prime and its reverse (1940415863) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3685140491 - 2⁶ = 3685140427 is a prime.

It is not a weakly prime, because it can be changed into another prime (3685140451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1842570245 + 1842570246.

It is an arithmetic number, because the mean of its divisors is an integer number (1842570246).

Almost surely, 2^3685140491 is an apocalyptic number.

3685140491 is a deficient number, since it is larger than the sum of its proper divisors (1).

3685140491 is an equidigital number, since it uses as much as digits as its factorization.

3685140491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 3685140491 is about 60705.3580089929. The cubic root of 3685140491 is about 1544.6070632440.

The spelling of 3685140491 in words is "three billion, six hundred eighty-five million, one hundred forty thousand, four hundred ninety-one".