250801987 has 2 divisors, whose sum is σ = 250801988. Its totient is φ = 250801986.

The previous prime is 250801951. The next prime is 250802039. The reversal of 250801987 is 789108052.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 250801987 - 2¹⁵ = 250769219 is a prime.

It is not a weakly prime, because it can be changed into another prime (250801787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125400993 + 125400994.

It is an arithmetic number, because the mean of its divisors is an integer number (125400994).

Almost surely, 2^250801987 is an apocalyptic number.

250801987 is a deficient number, since it is larger than the sum of its proper divisors (1).

250801987 is an equidigital number, since it uses as much as digits as its factorization.

250801987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 40.

The square root of 250801987 is about 15836.7290499017. The cubic root of 250801987 is about 630.6334327772.

The spelling of 250801987 in words is "two hundred fifty million, eight hundred one thousand, nine hundred eighty-seven".