2154923 has 4 divisors (see below), whose sum is σ = 2268360. Its totient is φ = 2041488.

The previous prime is 2154913. The next prime is 2154931. The reversal of 2154923 is 3294512.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2154923 - 2⁴ = 2154907 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2154892 and 2154901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2154913) 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, 56690 + ... + 56727.

It is an arithmetic number, because the mean of its divisors is an integer number (567090).

2^2154923 is an apocalyptic number.

2154923 is a deficient number, since it is larger than the sum of its proper divisors (113437).

2154923 is a wasteful number, since it uses less digits than its factorization.

2154923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113436.

The product of its digits is 2160, while the sum is 26.

The square root of 2154923 is about 1467.9655990520. The cubic root of 2154923 is about 129.1647235689.

The spelling of 2154923 in words is "two million, one hundred fifty-four thousand, nine hundred twenty-three".