223628497 has 4 divisors (see below), whose sum is σ = 223786420. Its totient is φ = 223470576.

The previous prime is 223628453. The next prime is 223628519. The reversal of 223628497 is 794826322.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 94556176 + 129072321 = 9724^2 + 11361^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-223628497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (223628437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76818 + ... + 79675.

It is an arithmetic number, because the mean of its divisors is an integer number (55946605).

Almost surely, 2^223628497 is an apocalyptic number.

It is an amenable number.

223628497 is a deficient number, since it is larger than the sum of its proper divisors (157923).

223628497 is a wasteful number, since it uses less digits than its factorization.

223628497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157922.

The product of its digits is 290304, while the sum is 43.

The square root of 223628497 is about 14954.2133527645. The cubic root of 223628497 is about 606.9818639767.

The spelling of 223628497 in words is "two hundred twenty-three million, six hundred twenty-eight thousand, four hundred ninety-seven".