39972747 has 8 divisors (see below), whose sum is σ = 53327680. Its totient is φ = 26633160.

The previous prime is 39972743. The next prime is 39972767. The reversal of 39972747 is 74727993.

It is a happy number.

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

It is not a de Polignac number, because 39972747 - 2² = 39972743 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 39972696 and 39972705.

It is not an unprimeable number, because it can be changed into a prime (39972743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5472 + ... + 10482.

It is an arithmetic number, because the mean of its divisors is an integer number (6665960).

Almost surely, 2^39972747 is an apocalyptic number.

39972747 is a deficient number, since it is larger than the sum of its proper divisors (13354933).

39972747 is a wasteful number, since it uses less digits than its factorization.

39972747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7673.

The product of its digits is 666792, while the sum is 48.

The square root of 39972747 is about 6322.4004143996. The cubic root of 39972747 is about 341.9175017317.

The spelling of 39972747 in words is "thirty-nine million, nine hundred seventy-two thousand, seven hundred forty-seven".