2391723 has 6 divisors (see below), whose sum is σ = 3454724. Its totient is φ = 1594476.

The previous prime is 2391721. The next prime is 2391733. The reversal of 2391723 is 3271932.

It is not a de Polignac number, because 2391723 - 2¹ = 2391721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2391721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 132865 + ... + 132882.

2^2391723 is an apocalyptic number.

2391723 is a deficient number, since it is larger than the sum of its proper divisors (1063001).

2391723 is a wasteful number, since it uses less digits than its factorization.

2391723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265753 (or 265750 counting only the distinct ones).

The product of its digits is 2268, while the sum is 27.

The square root of 2391723 is about 1546.5196410004. The cubic root of 2391723 is about 133.7324989475.

The spelling of 2391723 in words is "two million, three hundred ninety-one thousand, seven hundred twenty-three".