2478923 has 4 divisors (see below), whose sum is σ = 2624760. Its totient is φ = 2333088.

The previous prime is 2478899. The next prime is 2478937. The reversal of 2478923 is 3298742.

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 2478923 - 2¹⁰ = 2477899 is a prime.

It is a super-2 number, since 2×2478923² = 12290118479858, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2⁹ + 4⁹ + 7⁶ + 8 + 9³ + 2²¹ + 3⁶ .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2478953) 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, 72893 + ... + 72926.

It is an arithmetic number, because the mean of its divisors is an integer number (656190).

2^2478923 is an apocalyptic number.

2478923 is a deficient number, since it is larger than the sum of its proper divisors (145837).

2478923 is a wasteful number, since it uses less digits than its factorization.

2478923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145836.

The product of its digits is 24192, while the sum is 35.

The square root of 2478923 is about 1574.4595898276. The cubic root of 2478923 is about 135.3383920445.

The spelling of 2478923 in words is "two million, four hundred seventy-eight thousand, nine hundred twenty-three".