823567972 has 6 divisors (see below), whose sum is σ = 1441243958. Its totient is φ = 411783984.

The previous prime is 823567957. The next prime is 823567973. The reversal of 823567972 is 279765328.

It can be written as a sum of positive squares in only one way, i.e., 817045056 + 6522916 = 28584^2 + 2554^2 .

It is not an unprimeable number, because it can be changed into a prime (823567973) 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, 102945993 + ... + 102946000.

Almost surely, 2^823567972 is an apocalyptic number.

It is an amenable number.

823567972 is a deficient number, since it is larger than the sum of its proper divisors (617675986).

823567972 is a wasteful number, since it uses less digits than its factorization.

823567972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205891997 (or 205891995 counting only the distinct ones).

The product of its digits is 1270080, while the sum is 49.

The square root of 823567972 is about 28697.8739979114. The cubic root of 823567972 is about 937.3457536337.

The spelling of 823567972 in words is "eight hundred twenty-three million, five hundred sixty-seven thousand, nine hundred seventy-two".