6944743639 has 2 divisors, whose sum is σ = 6944743640. Its totient is φ = 6944743638.

The previous prime is 6944743609. The next prime is 6944743649. The reversal of 6944743639 is 9363474496.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6944743639 - 2³¹ = 4797259991 is a prime.

It is a super-2 number, since 2×6944743639² = 96458928422861924642, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6944743639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6944743609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3472371819 + 3472371820.

It is an arithmetic number, because the mean of its divisors is an integer number (3472371820).

Almost surely, 2^6944743639 is an apocalyptic number.

6944743639 is a deficient number, since it is larger than the sum of its proper divisors (1).

6944743639 is an equidigital number, since it uses as much as digits as its factorization.

6944743639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11757312, while the sum is 55.

The square root of 6944743639 is about 83335.1284813313. The cubic root of 6944743639 is about 1907.8844699103.

The spelling of 6944743639 in words is "six billion, nine hundred forty-four million, seven hundred forty-three thousand, six hundred thirty-nine".