823990933079 has 16 divisors (see below), whose sum is σ = 902600845920. Its totient is φ = 748733153280.

The previous prime is 823990933037. The next prime is 823990933091. The reversal of 823990933079 is 970339099328.

It is a cyclic number.

It is not a de Polignac number, because 823990933079 - 2²⁰ = 823989884503 is a prime.

It is a super-2 number, since 2×823990933079² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (823990933009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10096919 + ... + 10178199.

It is an arithmetic number, because the mean of its divisors is an integer number (56412552870).

Almost surely, 2^823990933079 is an apocalyptic number.

823990933079 is a deficient number, since it is larger than the sum of its proper divisors (78609912841).

823990933079 is a wasteful number, since it uses less digits than its factorization.

823990933079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101890.

The product of its (nonzero) digits is 19840464, while the sum is 62.

The spelling of 823990933079 in words is "eight hundred twenty-three billion, nine hundred ninety million, nine hundred thirty-three thousand, seventy-nine".