109218469 has 2 divisors, whose sum is σ = 109218470. Its totient is φ = 109218468.

The previous prime is 109218449. The next prime is 109218481. The reversal of 109218469 is 964812901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96530625 + 12687844 = 9825^2 + 3562^2 .

It is a cyclic number.

It is not a de Polignac number, because 109218469 - 2¹⁵ = 109185701 is a prime.

It is a super-2 number, since 2×109218469² = 23857347941407922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109218449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54609234 + 54609235.

It is an arithmetic number, because the mean of its divisors is an integer number (54609235).

Almost surely, 2^109218469 is an apocalyptic number.

It is an amenable number.

109218469 is a deficient number, since it is larger than the sum of its proper divisors (1).

109218469 is an equidigital number, since it uses as much as digits as its factorization.

109218469 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 109218469 is about 10450.7640390548. The cubic root of 109218469 is about 478.0045473211.

The spelling of 109218469 in words is "one hundred nine million, two hundred eighteen thousand, four hundred sixty-nine".