222678887 has 2 divisors, whose sum is σ = 222678888. Its totient is φ = 222678886.

The previous prime is 222678857. The next prime is 222678889. The reversal of 222678887 is 788876222.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222678887 is a prime.

Together with 222678889, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222678889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111339443 + 111339444.

It is an arithmetic number, because the mean of its divisors is an integer number (111339444).

Almost surely, 2^222678887 is an apocalyptic number.

222678887 is a deficient number, since it is larger than the sum of its proper divisors (1).

222678887 is an equidigital number, since it uses as much as digits as its factorization.

222678887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1204224, while the sum is 50.

The square root of 222678887 is about 14922.4289912869. The cubic root of 222678887 is about 606.1214878768.

The spelling of 222678887 in words is "two hundred twenty-two million, six hundred seventy-eight thousand, eight hundred eighty-seven".