244693639 has 2 divisors, whose sum is σ = 244693640. Its totient is φ = 244693638.

The previous prime is 244693627. The next prime is 244693649. The reversal of 244693639 is 936396442.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-244693639 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 (244693649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122346819 + 122346820.

It is an arithmetic number, because the mean of its divisors is an integer number (122346820).

Almost surely, 2^244693639 is an apocalyptic number.

244693639 is a deficient number, since it is larger than the sum of its proper divisors (1).

244693639 is an equidigital number, since it uses as much as digits as its factorization.

244693639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 839808, while the sum is 46.

The square root of 244693639 is about 15642.6864380771. The cubic root of 244693639 is about 625.4715494164.

The spelling of 244693639 in words is "two hundred forty-four million, six hundred ninety-three thousand, six hundred thirty-nine".