39744121 has 2 divisors, whose sum is σ = 39744122. Its totient is φ = 39744120.

The previous prime is 39744119. The next prime is 39744137. The reversal of 39744121 is 12144793.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25644096 + 14100025 = 5064^2 + 3755^2 .

It is an emirp because it is prime and its reverse (12144793) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39744121 - 2¹ = 39744119 is a prime.

Together with 39744119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (39744151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19872060 + 19872061.

It is an arithmetic number, because the mean of its divisors is an integer number (19872061).

Almost surely, 2^39744121 is an apocalyptic number.

It is an amenable number.

39744121 is a deficient number, since it is larger than the sum of its proper divisors (1).

39744121 is an equidigital number, since it uses as much as digits as its factorization.

39744121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048, while the sum is 31.

The square root of 39744121 is about 6304.2938541918. The cubic root of 39744121 is about 341.2643839062.

The spelling of 39744121 in words is "thirty-nine million, seven hundred forty-four thousand, one hundred twenty-one".