823909971033 has 6 divisors (see below), whose sum is σ = 1190092180394. Its totient is φ = 549273314016.

The previous prime is 823909971023. The next prime is 823909971103. The reversal of 823909971033 is 330179909328.

It can be written as a sum of positive squares in only one way, i.e., 751980340224 + 71929630809 = 867168^2 + 268197^2 .

It is not a de Polignac number, because 823909971033 - 2⁸ = 823909970777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (823909971023) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 45772776160 + ... + 45772776177.

Almost surely, 2^823909971033 is an apocalyptic number.

It is an amenable number.

823909971033 is a deficient number, since it is larger than the sum of its proper divisors (366182209361).

823909971033 is a wasteful number, since it uses less digits than its factorization.

823909971033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91545552343 (or 91545552340 counting only the distinct ones).

The product of its (nonzero) digits is 2204496, while the sum is 54.

The spelling of 823909971033 in words is "eight hundred twenty-three billion, nine hundred nine million, nine hundred seventy-one thousand, thirty-three".