250730009 has 2 divisors, whose sum is σ = 250730010. Its totient is φ = 250730008.

The previous prime is 250730003. The next prime is 250730057. The reversal of 250730009 is 900037052.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 248755984 + 1974025 = 15772^2 + 1405^2 .

It is a cyclic number.

It is not a de Polignac number, because 250730009 - 2⁴ = 250729993 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 250730009.

It is not a weakly prime, because it can be changed into another prime (250730003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125365004 + 125365005.

It is an arithmetic number, because the mean of its divisors is an integer number (125365005).

Almost surely, 2^250730009 is an apocalyptic number.

It is an amenable number.

250730009 is a deficient number, since it is larger than the sum of its proper divisors (1).

250730009 is an equidigital number, since it uses as much as digits as its factorization.

250730009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1890, while the sum is 26.

The square root of 250730009 is about 15834.4563847326. The cubic root of 250730009 is about 630.5730982256.

The spelling of 250730009 in words is "two hundred fifty million, seven hundred thirty thousand, nine".