39734921 has 2 divisors, whose sum is σ = 39734922. Its totient is φ = 39734920.

The previous prime is 39734917. The next prime is 39734941. The reversal of 39734921 is 12943793.

39734921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37210000 + 2524921 = 6100^2 + 1589^2 .

It is an emirp because it is prime and its reverse (12943793) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39734921 - 2² = 39734917 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (39734911) 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, 19867460 + 19867461.

It is an arithmetic number, because the mean of its divisors is an integer number (19867461).

Almost surely, 2^39734921 is an apocalyptic number.

It is an amenable number.

39734921 is a deficient number, since it is larger than the sum of its proper divisors (1).

39734921 is an equidigital number, since it uses as much as digits as its factorization.

39734921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40824, while the sum is 38.

The square root of 39734921 is about 6303.5641505421. The cubic root of 39734921 is about 341.2380498259.

The spelling of 39734921 in words is "thirty-nine million, seven hundred thirty-four thousand, nine hundred twenty-one".