244690861 has 2 divisors, whose sum is σ = 244690862. Its totient is φ = 244690860.

The previous prime is 244690841. The next prime is 244690891. The reversal of 244690861 is 168096442.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 152646025 + 92044836 = 12355^2 + 9594^2 .

It is a cyclic number.

It is not a de Polignac number, because 244690861 - 2¹⁵ = 244658093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (244690801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122345430 + 122345431.

It is an arithmetic number, because the mean of its divisors is an integer number (122345431).

Almost surely, 2^244690861 is an apocalyptic number.

It is an amenable number.

244690861 is a deficient number, since it is larger than the sum of its proper divisors (1).

244690861 is an equidigital number, since it uses as much as digits as its factorization.

244690861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 244690861 is about 15642.5976423355. The cubic root of 244690861 is about 625.4691824204.

The spelling of 244690861 in words is "two hundred forty-four million, six hundred ninety thousand, eight hundred sixty-one".