22429723 has 2 divisors, whose sum is σ = 22429724. Its totient is φ = 22429722.

The previous prime is 22429717. The next prime is 22429739. The reversal of 22429723 is 32792422.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22429723 is a prime.

It is not a weakly prime, because it can be changed into another prime (22429753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11214861 + 11214862.

It is an arithmetic number, because the mean of its divisors is an integer number (11214862).

Almost surely, 2^22429723 is an apocalyptic number.

22429723 is the 2532-nd centered heptagonal number.

22429723 is a deficient number, since it is larger than the sum of its proper divisors (1).

22429723 is an equidigital number, since it uses as much as digits as its factorization.

22429723 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 31.

The square root of 22429723 is about 4736.0028505059. The cubic root of 22429723 is about 282.0165768301.

The spelling of 22429723 in words is "twenty-two million, four hundred twenty-nine thousand, seven hundred twenty-three".