3733921 has 4 divisors (see below), whose sum is σ = 3778992. Its totient is φ = 3688852.

The previous prime is 3733913. The next prime is 3733963. The reversal of 3733921 is 1293373.

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 not a de Polignac number, because 3733921 - 2³ = 3733913 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3733921.

It is not an unprimeable number, because it can be changed into a prime (3733021) 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, 22411 + ... + 22576.

It is an arithmetic number, because the mean of its divisors is an integer number (944748).

Almost surely, 2^3733921 is an apocalyptic number.

It is an amenable number.

3733921 is a deficient number, since it is larger than the sum of its proper divisors (45071).

3733921 is an equidigital number, since it uses as much as digits as its factorization.

3733921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45070.

The product of its digits is 3402, while the sum is 28.

The square root of 3733921 is about 1932.3356333722. The cubic root of 3733921 is about 155.1392574363.

The spelling of 3733921 in words is "three million, seven hundred thirty-three thousand, nine hundred twenty-one".