3998951 has 4 divisors (see below), whose sum is σ = 4362504. Its totient is φ = 3635400.

The previous prime is 3998899. The next prime is 3998959. The reversal of 3998951 is 1598993.

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 3998951 - 2¹⁰ = 3997927 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 (3998959) 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, 181760 + ... + 181781.

It is an arithmetic number, because the mean of its divisors is an integer number (1090626).

Almost surely, 2^3998951 is an apocalyptic number.

3998951 is a deficient number, since it is larger than the sum of its proper divisors (363553).

3998951 is a wasteful number, since it uses less digits than its factorization.

3998951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363552.

The product of its digits is 87480, while the sum is 44.

The square root of 3998951 is about 1999.7377328040. The cubic root of 3998951 is about 158.7262274527.

The spelling of 3998951 in words is "three million, nine hundred ninety-eight thousand, nine hundred fifty-one".