250555993 has 2 divisors, whose sum is σ = 250555994. Its totient is φ = 250555992.

The previous prime is 250555973. The next prime is 250556023. The reversal of 250555993 is 399555052.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 230948809 + 19607184 = 15197^2 + 4428^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-250555993 is a prime.

It is not a weakly prime, because it can be changed into another prime (250555933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125277996 + 125277997.

It is an arithmetic number, because the mean of its divisors is an integer number (125277997).

Almost surely, 2^250555993 is an apocalyptic number.

It is an amenable number.

250555993 is a deficient number, since it is larger than the sum of its proper divisors (1).

250555993 is an equidigital number, since it uses as much as digits as its factorization.

250555993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 303750, while the sum is 43.

The square root of 250555993 is about 15828.9605786356. The cubic root of 250555993 is about 630.4271840288.

The spelling of 250555993 in words is "two hundred fifty million, five hundred fifty-five thousand, nine hundred ninety-three".