39364721 has 8 divisors (see below), whose sum is σ = 43071264. Its totient is φ = 35679520.

The previous prime is 39364679. The next prime is 39364727. The reversal of 39364721 is 12746393.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 39364721 - 2⁶ = 39364657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39364727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1340 + ... + 8973.

It is an arithmetic number, because the mean of its divisors is an integer number (5383908).

Almost surely, 2^39364721 is an apocalyptic number.

It is an amenable number.

39364721 is a deficient number, since it is larger than the sum of its proper divisors (3706543).

39364721 is a wasteful number, since it uses less digits than its factorization.

39364721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10671.

The product of its digits is 27216, while the sum is 35.

The square root of 39364721 is about 6274.1310952195. The cubic root of 39364721 is about 340.1749993004.

The spelling of 39364721 in words is "thirty-nine million, three hundred sixty-four thousand, seven hundred twenty-one".