3972207 has 4 divisors (see below), whose sum is σ = 5296280. Its totient is φ = 2648136.

The previous prime is 3972193. The next prime is 3972223. The reversal of 3972207 is 7022793.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7022793 = 3 ⋅2340931.

It is not a de Polignac number, because 3972207 - 2¹¹ = 3970159 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3972107) 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, 662032 + ... + 662037.

It is an arithmetic number, because the mean of its divisors is an integer number (1324070).

Almost surely, 2^3972207 is an apocalyptic number.

3972207 is a deficient number, since it is larger than the sum of its proper divisors (1324073).

3972207 is a wasteful number, since it uses less digits than its factorization.

3972207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1324072.

The product of its (nonzero) digits is 5292, while the sum is 30.

The square root of 3972207 is about 1993.0396383414. The cubic root of 3972207 is about 158.3715950622.

The spelling of 3972207 in words is "three million, nine hundred seventy-two thousand, two hundred seven".