1000022173 has 2 divisors, whose sum is σ = 1000022174. Its totient is φ = 1000022172.

The previous prime is 1000022081. The next prime is 1000022189. The reversal of 1000022173 is 3712200001.

It is a happy number.

It is an a-pointer prime, because the next prime (1000022189) can be obtained adding 1000022173 to its sum of digits (16).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 999950884 + 71289 = 31622^2 + 267^2 .

It is an emirp because it is prime and its reverse (3712200001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1000022173 - 2²¹ = 997925021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1000002173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500011086 + 500011087.

It is an arithmetic number, because the mean of its divisors is an integer number (500011087).

Almost surely, 2^1000022173 is an apocalyptic number.

It is an amenable number.

1000022173 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000022173 is an equidigital number, since it uses as much as digits as its factorization.

1000022173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 1000022173 is about 31623.1271856532. The cubic root of 1000022173 is about 1000.0073909454.

Adding to 1000022173 its reverse (3712200001), we get a palindrome (4712222174).

The spelling of 1000022173 in words is "one billion, twenty-two thousand, one hundred seventy-three".