290304961 has 2 divisors, whose sum is σ = 290304962. Its totient is φ = 290304960.

The previous prime is 290304953. The next prime is 290304967. The reversal of 290304961 is 169403092.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 290054961 + 250000 = 17031^2 + 500^2 .

It is a cyclic number.

It is not a de Polignac number, because 290304961 - 2³ = 290304953 is a prime.

It is not a weakly prime, because it can be changed into another prime (290304967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145152480 + 145152481.

It is an arithmetic number, because the mean of its divisors is an integer number (145152481).

Almost surely, 2^290304961 is an apocalyptic number.

It is an amenable number.

290304961 is a deficient number, since it is larger than the sum of its proper divisors (1).

290304961 is an equidigital number, since it uses as much as digits as its factorization.

290304961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 290304961 is about 17038.3379764577. The cubic root of 290304961 is about 662.1425329651.

The spelling of 290304961 in words is "two hundred ninety million, three hundred four thousand, nine hundred sixty-one".