3972669 has 4 divisors (see below), whose sum is σ = 5296896. Its totient is φ = 2648444.

The previous prime is 3972649. The next prime is 3972671. The reversal of 3972669 is 9662793.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3972669 - 2⁷ = 3972541 is a prime.

It is a super-2 number, since 2×3972669² = 31564197967122, which contains 22 as substring.

It is a D-number.

3972669 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 3972669.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3972649) 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, 662109 + ... + 662114.

It is an arithmetic number, because the mean of its divisors is an integer number (1324224).

Almost surely, 2^3972669 is an apocalyptic number.

It is an amenable number.

3972669 is a deficient number, since it is larger than the sum of its proper divisors (1324227).

3972669 is a wasteful number, since it uses less digits than its factorization.

3972669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1324226.

The product of its digits is 122472, while the sum is 42.

The square root of 3972669 is about 1993.1555383361. The cubic root of 3972669 is about 158.3777347926.

The spelling of 3972669 in words is "three million, nine hundred seventy-two thousand, six hundred sixty-nine".