22391723 has 2 divisors, whose sum is σ = 22391724. Its totient is φ = 22391722.

The previous prime is 22391717. The next prime is 22391731. The reversal of 22391723 is 32719322.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22391723 - 2¹⁰ = 22390699 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (22391713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11195861 + 11195862.

It is an arithmetic number, because the mean of its divisors is an integer number (11195862).

Almost surely, 2^22391723 is an apocalyptic number.

22391723 is a deficient number, since it is larger than the sum of its proper divisors (1).

22391723 is an equidigital number, since it uses as much as digits as its factorization.

22391723 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4536, while the sum is 29.

The square root of 22391723 is about 4731.9893279677. The cubic root of 22391723 is about 281.8572244745.

The spelling of 22391723 in words is "twenty-two million, three hundred ninety-one thousand, seven hundred twenty-three".