250139569 has 2 divisors, whose sum is σ = 250139570. Its totient is φ = 250139568.

The previous prime is 250139531. The next prime is 250139611. The reversal of 250139569 is 965931052.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 240653169 + 9486400 = 15513^2 + 3080^2 .

It is a cyclic number.

It is not a de Polignac number, because 250139569 - 2¹⁹ = 249615281 is a prime.

It is a super-2 number, since 2×250139569² = 125139607959011522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (250139509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125069784 + 125069785.

It is an arithmetic number, because the mean of its divisors is an integer number (125069785).

Almost surely, 2^250139569 is an apocalyptic number.

It is an amenable number.

250139569 is a deficient number, since it is larger than the sum of its proper divisors (1).

250139569 is an equidigital number, since it uses as much as digits as its factorization.

250139569 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72900, while the sum is 40.

The square root of 250139569 is about 15815.8012443252. The cubic root of 250139569 is about 630.0777337525.

The spelling of 250139569 in words is "two hundred fifty million, one hundred thirty-nine thousand, five hundred sixty-nine".