39247921 has 8 divisors (see below), whose sum is σ = 40292640. Its totient is φ = 38215968.

The previous prime is 39247919. The next prime is 39247963. The reversal of 39247921 is 12974293.

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 39247921 - 2¹ = 39247919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39247421) 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, 3205 + ... + 9421.

It is an arithmetic number, because the mean of its divisors is an integer number (5036580).

Almost surely, 2^39247921 is an apocalyptic number.

It is an amenable number.

39247921 is a deficient number, since it is larger than the sum of its proper divisors (1044719).

39247921 is a wasteful number, since it uses less digits than its factorization.

39247921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6383.

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

The square root of 39247921 is about 6264.8161186103. The cubic root of 39247921 is about 339.8382188802.

The spelling of 39247921 in words is "thirty-nine million, two hundred forty-seven thousand, nine hundred twenty-one".