2388921 has 4 divisors (see below), whose sum is σ = 3185232. Its totient is φ = 1592612.

The previous prime is 2388913. The next prime is 2388929. The reversal of 2388921 is 1298832.

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 (2388913) and next prime (2388929).

It is a cyclic number.

It is not a de Polignac number, because 2388921 - 2³ = 2388913 is a prime.

It is an Ulam number.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (2388929) 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, 398151 + ... + 398156.

It is an arithmetic number, because the mean of its divisors is an integer number (796308).

2^2388921 is an apocalyptic number.

It is an amenable number.

2388921 is a deficient number, since it is larger than the sum of its proper divisors (796311).

2388921 is an equidigital number, since it uses as much as digits as its factorization.

2388921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796310.

The product of its digits is 6912, while the sum is 33.

The square root of 2388921 is about 1545.6134704382. The cubic root of 2388921 is about 133.6802542004.

The spelling of 2388921 in words is "two million, three hundred eighty-eight thousand, nine hundred twenty-one".