223697897 has 2 divisors, whose sum is σ = 223697898. Its totient is φ = 223697896.

The previous prime is 223697869. The next prime is 223697899. The reversal of 223697897 is 798796322.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 223173721 + 524176 = 14939^2 + 724^2 .

It is a cyclic number.

It is not a de Polignac number, because 223697897 - 2⁶ = 223697833 is a prime.

Together with 223697899, 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 (223697899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111848948 + 111848949.

It is an arithmetic number, because the mean of its divisors is an integer number (111848949).

Almost surely, 2^223697897 is an apocalyptic number.

It is an amenable number.

223697897 is a deficient number, since it is larger than the sum of its proper divisors (1).

223697897 is an equidigital number, since it uses as much as digits as its factorization.

223697897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2286144, while the sum is 53.

The square root of 223697897 is about 14956.5335890373. The cubic root of 223697897 is about 607.0446469480.

The spelling of 223697897 in words is "two hundred twenty-three million, six hundred ninety-seven thousand, eight hundred ninety-seven".