1609009972 has 12 divisors (see below), whose sum is σ = 2891869540. Its totient is φ = 782761536.

The previous prime is 1609009967. The next prime is 1609009973. The reversal of 1609009972 is 2799009061.

It can be written as a sum of positive squares in 2 ways, for example, as 985708816 + 623301156 = 31396^2 + 24966^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1609009973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5435697 + ... + 5435992.

Almost surely, 2^1609009972 is an apocalyptic number.

It is an amenable number.

1609009972 is a deficient number, since it is larger than the sum of its proper divisors (1282859568).

1609009972 is a wasteful number, since it uses less digits than its factorization.

1609009972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10871730 (or 10871728 counting only the distinct ones).

The product of its (nonzero) digits is 61236, while the sum is 43.

The square root of 1609009972 is about 40112.4665409645. The cubic root of 1609009972 is about 1171.7984302748.

The spelling of 1609009972 in words is "one billion, six hundred nine million, nine thousand, nine hundred seventy-two".