3972099 has 4 divisors (see below), whose sum is σ = 5296136. Its totient is φ = 2648064.

The previous prime is 3972091. The next prime is 3972103. The reversal of 3972099 is 9902793.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 3972099 - 2³ = 3972091 is a prime.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3972091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 662014 + ... + 662019.

It is an arithmetic number, because the mean of its divisors is an integer number (1324034).

Almost surely, 2^3972099 is an apocalyptic number.

3972099 is a deficient number, since it is larger than the sum of its proper divisors (1324037).

3972099 is a wasteful number, since it uses less digits than its factorization.

3972099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1324036.

The product of its (nonzero) digits is 30618, while the sum is 39.

The square root of 3972099 is about 1993.0125438642. The cubic root of 3972099 is about 158.3701597319.

The spelling of 3972099 in words is "three million, nine hundred seventy-two thousand, ninety-nine".