39972993 has 8 divisors (see below), whose sum is σ = 53335968. Its totient is φ = 26629344.

The previous prime is 39972949. The next prime is 39972997. The reversal of 39972993 is 39927993.

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

It is not a de Polignac number, because 39972993 - 2¹³ = 39964801 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (39972997) 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, 1005 + ... + 8997.

It is an arithmetic number, because the mean of its divisors is an integer number (6666996).

Almost surely, 2^39972993 is an apocalyptic number.

It is an amenable number.

39972993 is a deficient number, since it is larger than the sum of its proper divisors (13362975).

39972993 is a wasteful number, since it uses less digits than its factorization.

39972993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9663.

The product of its digits is 826686, while the sum is 51.

The square root of 39972993 is about 6322.4198690059. The cubic root of 39972993 is about 341.9182031390.

The spelling of 39972993 in words is "thirty-nine million, nine hundred seventy-two thousand, nine hundred ninety-three".