4030990681 has 2 divisors, whose sum is σ = 4030990682. Its totient is φ = 4030990680.

The previous prime is 4030990669. The next prime is 4030990781. The reversal of 4030990681 is 1860990304.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2276721225 + 1754269456 = 47715^2 + 41884^2 .

It is a cyclic number.

It is not a de Polignac number, because 4030990681 - 2⁷ = 4030990553 is a prime.

It is a super-2 number, since 2×4030990681² = 32497771740617687522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (4030990781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2015495340 + 2015495341.

It is an arithmetic number, because the mean of its divisors is an integer number (2015495341).

Almost surely, 2^4030990681 is an apocalyptic number.

It is an amenable number.

4030990681 is a deficient number, since it is larger than the sum of its proper divisors (1).

4030990681 is an equidigital number, since it uses as much as digits as its factorization.

4030990681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 4030990681 is about 63490.0833280285. The cubic root of 4030990681 is about 1591.4900632774.

The spelling of 4030990681 in words is "four billion, thirty million, nine hundred ninety thousand, six hundred eighty-one".