3972999 has 8 divisors (see below), whose sum is σ = 5307120. Its totient is φ = 2643776.

The previous prime is 3972979. The next prime is 3973007. The reversal of 3972999 is 9992793.

It is a happy number.

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 3972999 - 2¹⁵ = 3940231 is a prime.

3972999 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3972959) 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, 1609 + ... + 3245.

It is an arithmetic number, because the mean of its divisors is an integer number (663390).

Almost surely, 2^3972999 is an apocalyptic number.

3972999 is a deficient number, since it is larger than the sum of its proper divisors (1334121).

3972999 is a wasteful number, since it uses less digits than its factorization.

3972999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2449.

The product of its digits is 275562, while the sum is 48.

The square root of 3972999 is about 1993.2383199206. The cubic root of 3972999 is about 158.3821200229.

The spelling of 3972999 in words is "three million, nine hundred seventy-two thousand, nine hundred ninety-nine".