222719897 has 2 divisors, whose sum is σ = 222719898. Its totient is φ = 222719896.

The previous prime is 222719891. The next prime is 222719899. The reversal of 222719897 is 798917222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 112805641 + 109914256 = 10621^2 + 10484^2 .

It is a cyclic number.

It is not a de Polignac number, because 222719897 - 2⁸ = 222719641 is a prime.

Together with 222719899, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (222719891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111359948 + 111359949.

It is an arithmetic number, because the mean of its divisors is an integer number (111359949).

Almost surely, 2^222719897 is an apocalyptic number.

It is an amenable number.

222719897 is a deficient number, since it is larger than the sum of its proper divisors (1).

222719897 is an equidigital number, since it uses as much as digits as its factorization.

222719897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 47.

The square root of 222719897 is about 14923.8030340795. The cubic root of 222719897 is about 606.1586946918.

The spelling of 222719897 in words is "two hundred twenty-two million, seven hundred nineteen thousand, eight hundred ninety-seven".