39944371 has 2 divisors, whose sum is σ = 39944372. Its totient is φ = 39944370.

The previous prime is 39944363. The next prime is 39944393. The reversal of 39944371 is 17344993.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 39944371 - 2³ = 39944363 is a prime.

It is not a weakly prime, because it can be changed into another prime (39944321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19972185 + 19972186.

It is an arithmetic number, because the mean of its divisors is an integer number (19972186).

Almost surely, 2^39944371 is an apocalyptic number.

39944371 is a deficient number, since it is larger than the sum of its proper divisors (1).

39944371 is an equidigital number, since it uses as much as digits as its factorization.

39944371 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 40.

The square root of 39944371 is about 6320.1559316207. The cubic root of 39944371 is about 341.8365753632.

The spelling of 39944371 in words is "thirty-nine million, nine hundred forty-four thousand, three hundred seventy-one".