2923391 has 4 divisors (see below), whose sum is σ = 2973000. Its totient is φ = 2873784.

The previous prime is 2923387. The next prime is 2923409. The reversal of 2923391 is 1933292.

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 2923391 - 2² = 2923387 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 (2923351) 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, 24716 + ... + 24833.

It is an arithmetic number, because the mean of its divisors is an integer number (743250).

2^2923391 is an apocalyptic number.

2923391 is a deficient number, since it is larger than the sum of its proper divisors (49609).

2923391 is an equidigital number, since it uses as much as digits as its factorization.

2923391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49608.

The product of its digits is 2916, while the sum is 29.

The square root of 2923391 is about 1709.7926774905. The cubic root of 2923391 is about 142.9866973786.

Subtracting from 2923391 its reverse (1933292), we obtain a palindrome (990099).

The spelling of 2923391 in words is "two million, nine hundred twenty-three thousand, three hundred ninety-one".