222749869 has 2 divisors, whose sum is σ = 222749870. Its totient is φ = 222749868.

The previous prime is 222749809. The next prime is 222749881. The reversal of 222749869 is 968947222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 215796100 + 6953769 = 14690^2 + 2637^2 .

It is a cyclic number.

It is not a de Polignac number, because 222749869 - 2¹⁵ = 222717101 is a prime.

It is a super-2 number, since 2×222749869² = 99235008279034322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222749809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111374934 + 111374935.

It is an arithmetic number, because the mean of its divisors is an integer number (111374935).

Almost surely, 2^222749869 is an apocalyptic number.

It is an amenable number.

222749869 is a deficient number, since it is larger than the sum of its proper divisors (1).

222749869 is an equidigital number, since it uses as much as digits as its factorization.

222749869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 870912, while the sum is 49.

The square root of 222749869 is about 14924.8071679335. The cubic root of 222749869 is about 606.1858842600.

The spelling of 222749869 in words is "two hundred twenty-two million, seven hundred forty-nine thousand, eight hundred sixty-nine".