3998291 has 4 divisors (see below), whose sum is σ = 4361784. Its totient is φ = 3634800.

The previous prime is 3998273. The next prime is 3998299. The reversal of 3998291 is 1928993.

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 3998291 - 2¹⁰ = 3997267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3998299) 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, 181730 + ... + 181751.

It is an arithmetic number, because the mean of its divisors is an integer number (1090446).

Almost surely, 2^3998291 is an apocalyptic number.

3998291 is a deficient number, since it is larger than the sum of its proper divisors (363493).

3998291 is a wasteful number, since it uses less digits than its factorization.

3998291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363492.

The product of its digits is 34992, while the sum is 41.

The square root of 3998291 is about 1999.5727043546. The cubic root of 3998291 is about 158.7174947398.

The spelling of 3998291 in words is "three million, nine hundred ninety-eight thousand, two hundred ninety-one".