3988397 has 4 divisors (see below), whose sum is σ = 4558176. Its totient is φ = 3418620.

The previous prime is 3988381. The next prime is 3988403. The reversal of 3988397 is 7938893.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3988397 - 2⁴ = 3988381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3988097) 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, 284879 + ... + 284892.

It is an arithmetic number, because the mean of its divisors is an integer number (1139544).

Almost surely, 2^3988397 is an apocalyptic number.

It is an amenable number.

3988397 is a deficient number, since it is larger than the sum of its proper divisors (569779).

3988397 is an equidigital number, since it uses as much as digits as its factorization.

3988397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 569778.

The product of its digits is 326592, while the sum is 47.

The square root of 3988397 is about 1997.0971433558. The cubic root of 3988397 is about 158.5864680933.

The spelling of 3988397 in words is "three million, nine hundred eighty-eight thousand, three hundred ninety-seven".