222996989 has 2 divisors, whose sum is σ = 222996990. Its totient is φ = 222996988.

The previous prime is 222996967. The next prime is 222996997. The reversal of 222996989 is 989699222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 222994489 + 2500 = 14933^2 + 50^2 .

It is a cyclic number.

It is not a de Polignac number, because 222996989 - 2¹⁶ = 222931453 is a prime.

It is a super-2 number, since 2×222996989² = 99455314206132242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222996959) 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, 111498494 + 111498495.

It is an arithmetic number, because the mean of its divisors is an integer number (111498495).

Almost surely, 2^222996989 is an apocalyptic number.

It is an amenable number.

222996989 is a deficient number, since it is larger than the sum of its proper divisors (1).

222996989 is an equidigital number, since it uses as much as digits as its factorization.

222996989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2519424, while the sum is 56.

The square root of 222996989 is about 14933.0837069910. The cubic root of 222996989 is about 606.4099701280.

The spelling of 222996989 in words is "two hundred twenty-two million, nine hundred ninety-six thousand, nine hundred eighty-nine".