223903969 has 2 divisors, whose sum is σ = 223903970. Its totient is φ = 223903968.

The previous prime is 223903943. The next prime is 223903973. The reversal of 223903969 is 969309322.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 181171600 + 42732369 = 13460^2 + 6537^2 .

It is a cyclic number.

It is not a de Polignac number, because 223903969 - 2¹¹ = 223901921 is a prime.

It is a super-2 number, since 2×223903969² = 100265974667905922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (223900969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111951984 + 111951985.

It is an arithmetic number, because the mean of its divisors is an integer number (111951985).

Almost surely, 2^223903969 is an apocalyptic number.

It is an amenable number.

223903969 is a deficient number, since it is larger than the sum of its proper divisors (1).

223903969 is an equidigital number, since it uses as much as digits as its factorization.

223903969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 157464, while the sum is 43.

The square root of 223903969 is about 14963.4210326382. The cubic root of 223903969 is about 607.2309942689.

The spelling of 223903969 in words is "two hundred twenty-three million, nine hundred three thousand, nine hundred sixty-nine".