1222388887 has 2 divisors, whose sum is σ = 1222388888. Its totient is φ = 1222388886.

The previous prime is 1222388879. The next prime is 1222388899. The reversal of 1222388887 is 7888832221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1222388887 - 2³ = 1222388879 is a prime.

It is a super-2 number, since 2×1222388887² = 2988469182122197538, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1222388887.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1222388087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611194443 + 611194444.

It is an arithmetic number, because the mean of its divisors is an integer number (611194444).

Almost surely, 2^1222388887 is an apocalyptic number.

1222388887 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222388887 is an equidigital number, since it uses as much as digits as its factorization.

1222388887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 688128, while the sum is 49.

The square root of 1222388887 is about 34962.6784872098. The cubic root of 1222388887 is about 1069.2267062440.

The spelling of 1222388887 in words is "one billion, two hundred twenty-two million, three hundred eighty-eight thousand, eight hundred eighty-seven".