3680973581 has 2 divisors, whose sum is σ = 3680973582. Its totient is φ = 3680973580.

The previous prime is 3680973577. The next prime is 3680973599. The reversal of 3680973581 is 1853790863.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3665212681 + 15760900 = 60541^2 + 3970^2 .

It is an emirp because it is prime and its reverse (1853790863) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3680973581 - 2² = 3680973577 is a prime.

It is a super-2 number, since 2×3680973581² = 27099133008039927122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3680973181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1840486790 + 1840486791.

It is an arithmetic number, because the mean of its divisors is an integer number (1840486791).

Almost surely, 2^3680973581 is an apocalyptic number.

It is an amenable number.

3680973581 is a deficient number, since it is larger than the sum of its proper divisors (1).

3680973581 is an equidigital number, since it uses as much as digits as its factorization.

3680973581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1088640, while the sum is 50.

The square root of 3680973581 is about 60671.0275255002. The cubic root of 3680973581 is about 1544.0246642782.

The spelling of 3680973581 in words is "three billion, six hundred eighty million, nine hundred seventy-three thousand, five hundred eighty-one".