244668857 has 2 divisors, whose sum is σ = 244668858. Its totient is φ = 244668856.

The previous prime is 244668821. The next prime is 244668937. The reversal of 244668857 is 758866442.

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., 173080336 + 71588521 = 13156^2 + 8461^2 .

It is a cyclic number.

It is not a de Polignac number, because 244668857 - 2¹⁰ = 244667833 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (244662857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122334428 + 122334429.

It is an arithmetic number, because the mean of its divisors is an integer number (122334429).

Almost surely, 2^244668857 is an apocalyptic number.

It is an amenable number.

244668857 is a deficient number, since it is larger than the sum of its proper divisors (1).

244668857 is an equidigital number, since it uses as much as digits as its factorization.

244668857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2580480, while the sum is 50.

The square root of 244668857 is about 15641.8942906542. The cubic root of 244668857 is about 625.4504332711.

The spelling of 244668857 in words is "two hundred forty-four million, six hundred sixty-eight thousand, eight hundred fifty-seven".