3998697 has 8 divisors (see below), whose sum is σ = 5381856. Its totient is φ = 2640672.

The previous prime is 3998693. The next prime is 3998707. The reversal of 3998697 is 7968993.

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

It is not a de Polignac number, because 3998697 - 2² = 3998693 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3998693) 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, 5908 + ... + 6549.

It is an arithmetic number, because the mean of its divisors is an integer number (672732).

Almost surely, 2^3998697 is an apocalyptic number.

It is an amenable number.

3998697 is a deficient number, since it is larger than the sum of its proper divisors (1383159).

3998697 is a wasteful number, since it uses less digits than its factorization.

3998697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12567.

The product of its digits is 734832, while the sum is 51.

The square root of 3998697 is about 1999.6742234674. The cubic root of 3998697 is about 158.7228667951.

The spelling of 3998697 in words is "three million, nine hundred ninety-eight thousand, six hundred ninety-seven".