989826823 has 2 divisors, whose sum is σ = 989826824. Its totient is φ = 989826822.

The previous prime is 989826763. The next prime is 989826881. The reversal of 989826823 is 328628989.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 989826823 - 2¹³ = 989818631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (989820823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494913411 + 494913412.

It is an arithmetic number, because the mean of its divisors is an integer number (494913412).

Almost surely, 2^989826823 is an apocalyptic number.

989826823 is a deficient number, since it is larger than the sum of its proper divisors (1).

989826823 is an equidigital number, since it uses as much as digits as its factorization.

989826823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2985984, while the sum is 55.

The square root of 989826823 is about 31461.5133615661. The cubic root of 989826823 is about 996.5973762835.

The spelling of 989826823 in words is "nine hundred eighty-nine million, eight hundred twenty-six thousand, eight hundred twenty-three".