290680681 has 2 divisors, whose sum is σ = 290680682. Its totient is φ = 290680680.

The previous prime is 290680667. The next prime is 290680697. The reversal of 290680681 is 186086092.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 279424656 + 11256025 = 16716^2 + 3355^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-290680681 is a prime.

It is a super-2 number, since 2×290680681² = 168990516613247522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (290680631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145340340 + 145340341.

It is an arithmetic number, because the mean of its divisors is an integer number (145340341).

Almost surely, 2^290680681 is an apocalyptic number.

It is an amenable number.

290680681 is a deficient number, since it is larger than the sum of its proper divisors (1).

290680681 is an equidigital number, since it uses as much as digits as its factorization.

290680681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 290680681 is about 17049.3601346209. The cubic root of 290680681 is about 662.4280636737.

The spelling of 290680681 in words is "two hundred ninety million, six hundred eighty thousand, six hundred eighty-one".