223456997 has 2 divisors, whose sum is σ = 223456998. Its totient is φ = 223456996.

The previous prime is 223456991. The next prime is 223457033. The reversal of 223456997 is 799654322.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 214300321 + 9156676 = 14639^2 + 3026^2 .

It is a cyclic number.

It is not a de Polignac number, because 223456997 - 2²⁰ = 222408421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (223456991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111728498 + 111728499.

It is an arithmetic number, because the mean of its divisors is an integer number (111728499).

Almost surely, 2^223456997 is an apocalyptic number.

It is an amenable number.

223456997 is a deficient number, since it is larger than the sum of its proper divisors (1).

223456997 is an equidigital number, since it uses as much as digits as its factorization.

223456997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 816480, while the sum is 47.

The square root of 223456997 is about 14948.4780830692. The cubic root of 223456997 is about 606.8266601259.

The spelling of 223456997 in words is "two hundred twenty-three million, four hundred fifty-six thousand, nine hundred ninety-seven".