3387921 has 4 divisors (see below), whose sum is σ = 4517232. Its totient is φ = 2258612.

The previous prime is 3387911. The next prime is 3387931. The reversal of 3387921 is 1297833.

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 an interprime number because it is at equal distance from previous prime (3387911) and next prime (3387931).

It is a cyclic number.

It is not a de Polignac number, because 3387921 - 2¹⁰ = 3386897 is a prime.

It is a super-2 number, since 2×3387921² = 22956017404482, which contains 22 as substring.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (3387911) 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, 564651 + ... + 564656.

It is an arithmetic number, because the mean of its divisors is an integer number (1129308).

Almost surely, 2^3387921 is an apocalyptic number.

It is an amenable number.

3387921 is a deficient number, since it is larger than the sum of its proper divisors (1129311).

3387921 is a wasteful number, since it uses less digits than its factorization.

3387921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1129310.

The product of its digits is 9072, while the sum is 33.

The square root of 3387921 is about 1840.6305984635. The cubic root of 3387921 is about 150.1911784574.

The spelling of 3387921 in words is "three million, three hundred eighty-seven thousand, nine hundred twenty-one".