3997898 has 4 divisors (see below), whose sum is σ = 5996850. Its totient is φ = 1998948.

The previous prime is 3997897. The next prime is 3997909. The reversal of 3997898 is 8987993.

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

It can be written as a sum of positive squares in only one way, i.e., 3948169 + 49729 = 1987^2 + 223^2 .

It is not an unprimeable number, because it can be changed into a prime (3997891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 999473 + ... + 999476.

Almost surely, 2^3997898 is an apocalyptic number.

3997898 is a deficient number, since it is larger than the sum of its proper divisors (1998952).

3997898 is a wasteful number, since it uses less digits than its factorization.

3997898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1998951.

The product of its digits is 979776, while the sum is 53.

The square root of 3997898 is about 1999.4744309443. The cubic root of 3997898 is about 158.7122943496.

The spelling of 3997898 in words is "three million, nine hundred ninety-seven thousand, eight hundred ninety-eight".