39197021 has 8 divisors (see below), whose sum is σ = 39729984. Its totient is φ = 38666880.

The previous prime is 39197017. The next prime is 39197047. The reversal of 39197021 is 12079193.

It is a happy number.

39197021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 39197021 - 2² = 39197017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39197321) 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 in 7 ways as a sum of consecutive naturals, for example, 47216 + ... + 48038.

It is an arithmetic number, because the mean of its divisors is an integer number (4966248).

Almost surely, 2^39197021 is an apocalyptic number.

It is an amenable number.

39197021 is a deficient number, since it is larger than the sum of its proper divisors (532963).

39197021 is an equidigital number, since it uses as much as digits as its factorization.

39197021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1411.

The product of its (nonzero) digits is 3402, while the sum is 32.

The square root of 39197021 is about 6260.7524308185. The cubic root of 39197021 is about 339.6912450785.

The spelling of 39197021 in words is "thirty-nine million, one hundred ninety-seven thousand, twenty-one".