39409121 has 2 divisors, whose sum is σ = 39409122. Its totient is φ = 39409120.

The previous prime is 39409099. The next prime is 39409127. The reversal of 39409121 is 12190493.

It is a happy number.

39409121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36481600 + 2927521 = 6040^2 + 1711^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39409121 is a prime.

It is not a weakly prime, because it can be changed into another prime (39409127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19704560 + 19704561.

It is an arithmetic number, because the mean of its divisors is an integer number (19704561).

Almost surely, 2^39409121 is an apocalyptic number.

It is an amenable number.

39409121 is a deficient number, since it is larger than the sum of its proper divisors (1).

39409121 is an equidigital number, since it uses as much as digits as its factorization.

39409121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 39409121 is about 6277.6684366092. The cubic root of 39409121 is about 340.3028472360.

The spelling of 39409121 in words is "thirty-nine million, four hundred nine thousand, one hundred twenty-one".