244691261 has 2 divisors, whose sum is σ = 244691262. Its totient is φ = 244691260.

The previous prime is 244691243. The next prime is 244691267. The reversal of 244691261 is 162196442.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 240715225 + 3976036 = 15515^2 + 1994^2 .

It is a cyclic number.

It is not a de Polignac number, because 244691261 - 2⁶ = 244691197 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (244691267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122345630 + 122345631.

It is an arithmetic number, because the mean of its divisors is an integer number (122345631).

Almost surely, 2^244691261 is an apocalyptic number.

It is an amenable number.

244691261 is a deficient number, since it is larger than the sum of its proper divisors (1).

244691261 is an equidigital number, since it uses as much as digits as its factorization.

244691261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 35.

The square root of 244691261 is about 15642.6104279305. The cubic root of 244691261 is about 625.4695232417.

The spelling of 244691261 in words is "two hundred forty-four million, six hundred ninety-one thousand, two hundred sixty-one".