39297421 has 4 divisors (see below), whose sum is σ = 41609052. Its totient is φ = 36985792.

The previous prime is 39297397. The next prime is 39297431. The reversal of 39297421 is 12479293.

39297421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12479293 = 41 ⋅304373.

It can be written as a sum of positive squares in 2 ways, for example, as 12888100 + 26409321 = 3590^2 + 5139^2 .

It is a cyclic number.

It is not a de Polignac number, because 39297421 - 2⁵ = 39297389 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 (39297431) 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 3 ways as a sum of consecutive naturals, for example, 1155790 + ... + 1155823.

It is an arithmetic number, because the mean of its divisors is an integer number (10402263).

Almost surely, 2^39297421 is an apocalyptic number.

It is an amenable number.

39297421 is a deficient number, since it is larger than the sum of its proper divisors (2311631).

39297421 is a wasteful number, since it uses less digits than its factorization.

39297421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2311630.

The product of its digits is 27216, while the sum is 37.

The square root of 39297421 is about 6268.7655084554. The cubic root of 39297421 is about 339.9810283532.

The spelling of 39297421 in words is "thirty-nine million, two hundred ninety-seven thousand, four hundred twenty-one".