39073921 has 2 divisors, whose sum is σ = 39073922. Its totient is φ = 39073920.

The previous prime is 39073913. The next prime is 39073997. The reversal of 39073921 is 12937093.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36433296 + 2640625 = 6036^2 + 1625^2 .

It is a cyclic number.

It is not a de Polignac number, because 39073921 - 2³ = 39073913 is a prime.

It is not a weakly prime, because it can be changed into another prime (39073901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19536960 + 19536961.

It is an arithmetic number, because the mean of its divisors is an integer number (19536961).

Almost surely, 2^39073921 is an apocalyptic number.

It is an amenable number.

39073921 is a deficient number, since it is larger than the sum of its proper divisors (1).

39073921 is an equidigital number, since it uses as much as digits as its factorization.

39073921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10206, while the sum is 34.

The square root of 39073921 is about 6250.9136132249. The cubic root of 39073921 is about 339.3352669733.

The spelling of 39073921 in words is "thirty-nine million, seventy-three thousand, nine hundred twenty-one".