3997207 has 6 divisors (see below), whose sum is σ = 4076912. Its totient is φ = 3919032.

The previous prime is 3997181. The next prime is 3997211. The reversal of 3997207 is 7027993.

It is a de Polignac number, because none of the positive numbers 2^k-3997207 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 (3997267) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2098 + ... + 3520.

Almost surely, 2^3997207 is an apocalyptic number.

3997207 is a deficient number, since it is larger than the sum of its proper divisors (79705).

3997207 is an equidigital number, since it uses as much as digits as its factorization.

3997207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1529 (or 1476 counting only the distinct ones).

The product of its (nonzero) digits is 23814, while the sum is 37.

The square root of 3997207 is about 1999.3016280692. The cubic root of 3997207 is about 158.7031498346.

The spelling of 3997207 in words is "three million, nine hundred ninety-seven thousand, two hundred seven".