2978423 has 4 divisors (see below), whose sum is σ = 3403920. Its totient is φ = 2552928.

The previous prime is 2978419. The next prime is 2978429. The reversal of 2978423 is 3248792.

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

It is not a de Polignac number, because 2978423 - 2² = 2978419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2978429) 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, 212738 + ... + 212751.

It is an arithmetic number, because the mean of its divisors is an integer number (850980).

2^2978423 is an apocalyptic number.

2978423 is a deficient number, since it is larger than the sum of its proper divisors (425497).

2978423 is an equidigital number, since it uses as much as digits as its factorization.

2978423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425496.

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

The square root of 2978423 is about 1725.8108239318. The cubic root of 2978423 is about 143.8783534129.

The spelling of 2978423 in words is "two million, nine hundred seventy-eight thousand, four hundred twenty-three".