249060857 has 2 divisors, whose sum is σ = 249060858. Its totient is φ = 249060856.

The previous prime is 249060821. The next prime is 249060871. The reversal of 249060857 is 758060942.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 239506576 + 9554281 = 15476^2 + 3091^2 .

It is a cyclic number.

It is not a de Polignac number, because 249060857 - 2¹² = 249056761 is a prime.

It is not a weakly prime, because it can be changed into another prime (249062857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124530428 + 124530429.

It is an arithmetic number, because the mean of its divisors is an integer number (124530429).

Almost surely, 2^249060857 is an apocalyptic number.

It is an amenable number.

249060857 is a deficient number, since it is larger than the sum of its proper divisors (1).

249060857 is an equidigital number, since it uses as much as digits as its factorization.

249060857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 249060857 is about 15781.6620480861. The cubic root of 249060857 is about 629.1707044247.

The spelling of 249060857 in words is "two hundred forty-nine million, sixty thousand, eight hundred fifty-seven".