22709173 has 4 divisors (see below), whose sum is σ = 22727980. Its totient is φ = 22690368.

The previous prime is 22709171. The next prime is 22709177. The reversal of 22709173 is 37190722.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37190722 = 2 ⋅18595361.

It can be written as a sum of positive squares in 2 ways, for example, as 11573604 + 11135569 = 3402^2 + 3337^2 .

It is a cyclic number.

It is not a de Polignac number, because 22709173 - 2¹ = 22709171 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 (22709171) 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 3 ways as a sum of consecutive naturals, for example, 7458 + ... + 10051.

It is an arithmetic number, because the mean of its divisors is an integer number (5681995).

Almost surely, 2^22709173 is an apocalyptic number.

It is an amenable number.

22709173 is a deficient number, since it is larger than the sum of its proper divisors (18807).

22709173 is a wasteful number, since it uses less digits than its factorization.

22709173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18806.

The product of its (nonzero) digits is 5292, while the sum is 31.

The square root of 22709173 is about 4765.4142527172. The cubic root of 22709173 is about 283.1829530327.

Adding to 22709173 its reverse (37190722), we get a palindrome (59899895).

The spelling of 22709173 in words is "twenty-two million, seven hundred nine thousand, one hundred seventy-three".