219424969 has 3 divisors (see below), whose sum is σ = 219439783. Its totient is φ = 219410156.

The previous prime is 219424963. The next prime is 219424973. The reversal of 219424969 is 969424912.

It is a happy number.

The square root of 219424969 is 14813.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 65367225 + 154057744 = 8085^2 + 12412^2 .

It is not a de Polignac number, because 219424969 - 2⁷ = 219424841 is a prime.

It is a super-2 number, since 2×219424969² = 96294634041301922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (219424963) 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 in 2 ways as a sum of consecutive naturals, for example, 7407 + ... + 22219.

Almost surely, 2^219424969 is an apocalyptic number.

219424969 is the 14813-rd square number.

219424969 is the 7407-th centered octagonal number.

It is an amenable number.

219424969 is a deficient number, since it is larger than the sum of its proper divisors (14814).

219424969 is an frugal number, since it uses more digits than its factorization.

219424969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29626 (or 14813 counting only the distinct ones).

The product of its digits is 279936, while the sum is 46.

The cubic root of 219424969 is about 603.1546521400.

The spelling of 219424969 in words is "two hundred nineteen million, four hundred twenty-four thousand, nine hundred sixty-nine".