250608661 has 2 divisors, whose sum is σ = 250608662. Its totient is φ = 250608660.

The previous prime is 250608649. The next prime is 250608671. The reversal of 250608661 is 166806052.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 183467025 + 67141636 = 13545^2 + 8194^2 .

It is a cyclic number.

It is not a de Polignac number, because 250608661 - 2¹¹ = 250606613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (250608671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125304330 + 125304331.

It is an arithmetic number, because the mean of its divisors is an integer number (125304331).

Almost surely, 2^250608661 is an apocalyptic number.

It is an amenable number.

250608661 is a deficient number, since it is larger than the sum of its proper divisors (1).

250608661 is an equidigital number, since it uses as much as digits as its factorization.

250608661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 250608661 is about 15830.6241506771. The cubic root of 250608661 is about 630.4713538134.

The spelling of 250608661 in words is "two hundred fifty million, six hundred eight thousand, six hundred sixty-one".