218469469 has 2 divisors, whose sum is σ = 218469470. Its totient is φ = 218469468.

The previous prime is 218469439. The next prime is 218469473. The reversal of 218469469 is 964964812.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 180499225 + 37970244 = 13435^2 + 6162^2 .

It is a cyclic number.

It is not a de Polignac number, because 218469469 - 2¹⁷ = 218338397 is a prime.

It is a super-2 number, since 2×218469469² = 95457817770283922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (218469439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109234734 + 109234735.

It is an arithmetic number, because the mean of its divisors is an integer number (109234735).

Almost surely, 2^218469469 is an apocalyptic number.

It is an amenable number.

218469469 is a deficient number, since it is larger than the sum of its proper divisors (1).

218469469 is an equidigital number, since it uses as much as digits as its factorization.

218469469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 746496, while the sum is 49.

The square root of 218469469 is about 14780.7127365361. The cubic root of 218469469 is about 602.2778864818.

The spelling of 218469469 in words is "two hundred eighteen million, four hundred sixty-nine thousand, four hundred sixty-nine".