22197916729 has 2 divisors, whose sum is σ = 22197916730. Its totient is φ = 22197916728.

The previous prime is 22197916717. The next prime is 22197916751. The reversal of 22197916729 is 92761979122.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12446749225 + 9751167504 = 111565^2 + 98748^2 .

It is a cyclic number.

It is not a de Polignac number, because 22197916729 - 2²¹ = 22195819577 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22197916729.

It is not a weakly prime, because it can be changed into another prime (22197916709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11098958364 + 11098958365.

It is an arithmetic number, because the mean of its divisors is an integer number (11098958365).

Almost surely, 2^22197916729 is an apocalyptic number.

It is an amenable number.

22197916729 is a deficient number, since it is larger than the sum of its proper divisors (1).

22197916729 is an equidigital number, since it uses as much as digits as its factorization.

22197916729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1714608, while the sum is 55.

The spelling of 22197916729 in words is "twenty-two billion, one hundred ninety-seven million, nine hundred sixteen thousand, seven hundred twenty-nine".