39064721 has 2 divisors, whose sum is σ = 39064722. Its totient is φ = 39064720.

The previous prime is 39064673. The next prime is 39064723. The reversal of 39064721 is 12746093.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19704721 + 19360000 = 4439^2 + 4400^2 .

It is a cyclic number.

It is not a de Polignac number, because 39064721 - 2¹⁰ = 39063697 is a prime.

Together with 39064723, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (39064723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19532360 + 19532361.

It is an arithmetic number, because the mean of its divisors is an integer number (19532361).

Almost surely, 2^39064721 is an apocalyptic number.

It is an amenable number.

39064721 is a deficient number, since it is larger than the sum of its proper divisors (1).

39064721 is an equidigital number, since it uses as much as digits as its factorization.

39064721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 39064721 is about 6250.1776774745. The cubic root of 39064721 is about 339.3086325888.

The spelling of 39064721 in words is "thirty-nine million, sixty-four thousand, seven hundred twenty-one".