823990933091 has 2 divisors, whose sum is σ = 823990933092. Its totient is φ = 823990933090.

The previous prime is 823990933037. The next prime is 823990933127. The reversal of 823990933091 is 190339099328.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 823990933091 - 2¹⁸ = 823990670947 is a prime.

It is a super-2 number, since 2×823990933091² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (823990033091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 411995466545 + 411995466546.

It is an arithmetic number, because the mean of its divisors is an integer number (411995466546).

Almost surely, 2^823990933091 is an apocalyptic number.

823990933091 is a deficient number, since it is larger than the sum of its proper divisors (1).

823990933091 is an equidigital number, since it uses as much as digits as its factorization.

823990933091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2834352, while the sum is 56.

The spelling of 823990933091 in words is "eight hundred twenty-three billion, nine hundred ninety million, nine hundred thirty-three thousand, ninety-one".