609447969 has 45 divisors (see below), whose sum is σ = 990522819. Its totient is φ = 373267440.

The previous prime is 609447967. The next prime is 609447983. The reversal of 609447969 is 969744906.

The square root of 609447969 is 24687.

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

It can be written as a sum of positive squares in only one way, i.e., 90155025 + 519292944 = 9495^2 + 22788^2 .

It is not a de Polignac number, because 609447969 - 2¹ = 609447967 is a prime.

It is a super-2 number, since 2×609447969² = 742853653836449922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (609447967) 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 44 ways as a sum of consecutive naturals, for example, 2888274 + ... + 2888484.

Almost surely, 2^609447969 is an apocalyptic number.

609447969 is the 24687-th square number.

609447969 is the 12344-th centered octagonal number.

It is an amenable number.

609447969 is a deficient number, since it is larger than the sum of its proper divisors (381074850).

609447969 is an equidigital number, since it uses as much as digits as its factorization.

609447969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460 (or 227 counting only the distinct ones).

The product of its (nonzero) digits is 2939328, while the sum is 54.

The cubic root of 609447969 is about 847.8366991715.

The spelling of 609447969 in words is "six hundred nine million, four hundred forty-seven thousand, nine hundred sixty-nine".