3972909 has 8 divisors (see below), whose sum is σ = 5315392. Its totient is φ = 2639520.

The previous prime is 3972901. The next prime is 3972911. The reversal of 3972909 is 9092793.

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

It is not a de Polignac number, because 3972909 - 2³ = 3972901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3972901) 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, 1177 + ... + 3054.

It is an arithmetic number, because the mean of its divisors is an integer number (664424).

Almost surely, 2^3972909 is an apocalyptic number.

It is an amenable number.

3972909 is a deficient number, since it is larger than the sum of its proper divisors (1342483).

3972909 is a wasteful number, since it uses less digits than its factorization.

3972909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4547.

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

The square root of 3972909 is about 1993.2157434658. The cubic root of 3972909 is about 158.3809240751.

The spelling of 3972909 in words is "three million, nine hundred seventy-two thousand, nine hundred nine".