22750729 has 2 divisors, whose sum is σ = 22750730. Its totient is φ = 22750728.

The previous prime is 22750723. The next prime is 22750747. The reversal of 22750729 is 92705722.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22325625 + 425104 = 4725^2 + 652^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22750729 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22750694 and 22750703.

It is not a weakly prime, because it can be changed into another prime (22750723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11375364 + 11375365.

It is an arithmetic number, because the mean of its divisors is an integer number (11375365).

Almost surely, 2^22750729 is an apocalyptic number.

It is an amenable number.

22750729 is a deficient number, since it is larger than the sum of its proper divisors (1).

22750729 is an equidigital number, since it uses as much as digits as its factorization.

22750729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 22750729 is about 4769.7724264371. The cubic root of 22750729 is about 283.3555819515.

The spelling of 22750729 in words is "twenty-two million, seven hundred fifty thousand, seven hundred twenty-nine".