3899281 has 4 divisors (see below), whose sum is σ = 3930112. Its totient is φ = 3868452.

The previous prime is 3899279. The next prime is 3899297. The reversal of 3899281 is 1829983.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1829983 = 37 ⋅49459.

It is a cyclic number.

It is not a de Polignac number, because 3899281 - 2¹ = 3899279 is a prime.

It is a super-2 number, since 2×3899281² = 30408784633922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3899201) 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, 15225 + ... + 15478.

It is an arithmetic number, because the mean of its divisors is an integer number (982528).

Almost surely, 2^3899281 is an apocalyptic number.

3899281 is the 1056-th centered heptagonal number.

It is an amenable number.

3899281 is a deficient number, since it is larger than the sum of its proper divisors (30831).

3899281 is a wasteful number, since it uses less digits than its factorization.

3899281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30830.

The product of its digits is 31104, while the sum is 40.

The square root of 3899281 is about 1974.6597175210. The cubic root of 3899281 is about 157.3964179934.

The spelling of 3899281 in words is "three million, eight hundred ninety-nine thousand, two hundred eighty-one".