3738921 has 4 divisors (see below), whose sum is σ = 4985232. Its totient is φ = 2492612.

The previous prime is 3738907. The next prime is 3738923. The reversal of 3738921 is 1298373.

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 a cyclic number.

It is not a de Polignac number, because 3738921 - 2⁹ = 3738409 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (3738923) 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, 623151 + ... + 623156.

It is an arithmetic number, because the mean of its divisors is an integer number (1246308).

Almost surely, 2^3738921 is an apocalyptic number.

It is an amenable number.

3738921 is a deficient number, since it is larger than the sum of its proper divisors (1246311).

3738921 is a wasteful number, since it uses less digits than its factorization.

3738921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1246310.

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

The square root of 3738921 is about 1933.6289716489. The cubic root of 3738921 is about 155.2084742468.

The spelling of 3738921 in words is "three million, seven hundred thirty-eight thousand, nine hundred twenty-one".