223442987 has 2 divisors, whose sum is σ = 223442988. Its totient is φ = 223442986.

The previous prime is 223442981. The next prime is 223443041. The reversal of 223442987 is 789244322.

223442987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 223442987 - 2¹⁸ = 223180843 is a prime.

It is not a weakly prime, because it can be changed into another prime (223442981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111721493 + 111721494.

It is an arithmetic number, because the mean of its divisors is an integer number (111721494).

Almost surely, 2^223442987 is an apocalyptic number.

223442987 is a deficient number, since it is larger than the sum of its proper divisors (1).

223442987 is an equidigital number, since it uses as much as digits as its factorization.

223442987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 193536, while the sum is 41.

The square root of 223442987 is about 14948.0094661463. The cubic root of 223442987 is about 606.8139778659.

The spelling of 223442987 in words is "two hundred twenty-three million, four hundred forty-two thousand, nine hundred eighty-seven".