244864861 has 2 divisors, whose sum is σ = 244864862. Its totient is φ = 244864860.

The previous prime is 244864859. The next prime is 244864883. The reversal of 244864861 is 168468442.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 177049636 + 67815225 = 13306^2 + 8235^2 .

It is a cyclic number.

It is not a de Polignac number, because 244864861 - 2¹ = 244864859 is a prime.

Together with 244864859, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (244864801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122432430 + 122432431.

It is an arithmetic number, because the mean of its divisors is an integer number (122432431).

Almost surely, 2^244864861 is an apocalyptic number.

It is an amenable number.

244864861 is a deficient number, since it is larger than the sum of its proper divisors (1).

244864861 is an equidigital number, since it uses as much as digits as its factorization.

244864861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 294912, while the sum is 43.

The square root of 244864861 is about 15648.1583900471. The cubic root of 244864861 is about 625.6174046176.

The spelling of 244864861 in words is "two hundred forty-four million, eight hundred sixty-four thousand, eight hundred sixty-one".