3997007 has 4 divisors (see below), whose sum is σ = 4568016. Its totient is φ = 3426000.

The previous prime is 3997003. The next prime is 3997039. The reversal of 3997007 is 7007993.

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

It is a cyclic number.

It is not a de Polignac number, because 3997007 - 2² = 3997003 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 (3997001) 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, 285494 + ... + 285507.

It is an arithmetic number, because the mean of its divisors is an integer number (1142004).

Almost surely, 2^3997007 is an apocalyptic number.

3997007 is a deficient number, since it is larger than the sum of its proper divisors (571009).

3997007 is an equidigital number, since it uses as much as digits as its factorization.

3997007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 571008.

The product of its (nonzero) digits is 11907, while the sum is 35.

The square root of 3997007 is about 1999.2516099781. The cubic root of 3997007 is about 158.7005028898.

The spelling of 3997007 in words is "three million, nine hundred ninety-seven thousand, seven".