223728949 has 2 divisors, whose sum is σ = 223728950. Its totient is φ = 223728948.

The previous prime is 223728943. The next prime is 223728961. The reversal of 223728949 is 949827322.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 134142724 + 89586225 = 11582^2 + 9465^2 .

It is a cyclic number.

It is not a de Polignac number, because 223728949 - 2⁵ = 223728917 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 223728899 and 223728908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (223728943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111864474 + 111864475.

It is an arithmetic number, because the mean of its divisors is an integer number (111864475).

Almost surely, 2^223728949 is an apocalyptic number.

It is an amenable number.

223728949 is a deficient number, since it is larger than the sum of its proper divisors (1).

223728949 is an equidigital number, since it uses as much as digits as its factorization.

223728949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 46.

The square root of 223728949 is about 14957.5716277743. The cubic root of 223728949 is about 607.0727340519.

The spelling of 223728949 in words is "two hundred twenty-three million, seven hundred twenty-eight thousand, nine hundred forty-nine".