244161391 has 2 divisors, whose sum is σ = 244161392. Its totient is φ = 244161390.

The previous prime is 244161389. The next prime is 244161431. The reversal of 244161391 is 193161442.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 244161391 - 2¹ = 244161389 is a prime.

It is a super-2 number, since 2×244161391² = 119229569710109762, which contains 22 as substring.

Together with 244161389, 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 (244161311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122080695 + 122080696.

It is an arithmetic number, because the mean of its divisors is an integer number (122080696).

Almost surely, 2^244161391 is an apocalyptic number.

244161391 is a deficient number, since it is larger than the sum of its proper divisors (1).

244161391 is an equidigital number, since it uses as much as digits as its factorization.

244161391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 31.

The square root of 244161391 is about 15625.6644978702. The cubic root of 244161391 is about 625.0177198176.

The spelling of 244161391 in words is "two hundred forty-four million, one hundred sixty-one thousand, three hundred ninety-one".