39944159 has 2 divisors, whose sum is σ = 39944160. Its totient is φ = 39944158.

The previous prime is 39944147. The next prime is 39944161. The reversal of 39944159 is 95144993.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 39944159 - 2²⁴ = 23166943 is a prime.

Together with 39944161, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39944189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19972079 + 19972080.

It is an arithmetic number, because the mean of its divisors is an integer number (19972080).

Almost surely, 2^39944159 is an apocalyptic number.

39944159 is a deficient number, since it is larger than the sum of its proper divisors (1).

39944159 is an equidigital number, since it uses as much as digits as its factorization.

39944159 is an evil number, because the sum of its binary digits is even.

The product of its digits is 174960, while the sum is 44.

The square root of 39944159 is about 6320.1391598603. The cubic root of 39944159 is about 341.8359706098.

The spelling of 39944159 in words is "thirty-nine million, nine hundred forty-four thousand, one hundred fifty-nine".