244313891 has 2 divisors, whose sum is σ = 244313892. Its totient is φ = 244313890.

The previous prime is 244313873. The next prime is 244313947. The reversal of 244313891 is 198313442.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 244313891 - 2⁶ = 244313827 is a prime.

It is equal to p_13384871 and since 244313891 and 13384871 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (244313491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122156945 + 122156946.

It is an arithmetic number, because the mean of its divisors is an integer number (122156946).

Almost surely, 2^244313891 is an apocalyptic number.

244313891 is a deficient number, since it is larger than the sum of its proper divisors (1).

244313891 is an equidigital number, since it uses as much as digits as its factorization.

244313891 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 244313891 is about 15630.5435286173. The cubic root of 244313891 is about 625.1478186900.

The spelling of 244313891 in words is "two hundred forty-four million, three hundred thirteen thousand, eight hundred ninety-one".