250705397 has 2 divisors, whose sum is σ = 250705398. Its totient is φ = 250705396.

The previous prime is 250705391. The next prime is 250705417. The reversal of 250705397 is 793507052.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 181333156 + 69372241 = 13466^2 + 8329^2 .

It is a cyclic number.

It is not a de Polignac number, because 250705397 - 2⁴ = 250705381 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 250705397.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (250705391) 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, 125352698 + 125352699.

It is an arithmetic number, because the mean of its divisors is an integer number (125352699).

Almost surely, 2^250705397 is an apocalyptic number.

It is an amenable number.

250705397 is a deficient number, since it is larger than the sum of its proper divisors (1).

250705397 is an equidigital number, since it uses as much as digits as its factorization.

250705397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 66150, while the sum is 38.

The square root of 250705397 is about 15833.6791997312. The cubic root of 250705397 is about 630.5524649117.

The spelling of 250705397 in words is "two hundred fifty million, seven hundred five thousand, three hundred ninety-seven".