998979833 has 2 divisors, whose sum is σ = 998979834. Its totient is φ = 998979832.

The previous prime is 998979829. The next prime is 998979899. The reversal of 998979833 is 338979899.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 573506704 + 425473129 = 23948^2 + 20627^2 .

It is a cyclic number.

It is not a de Polignac number, because 998979833 - 2² = 998979829 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 998979833.

It is not a weakly prime, because it can be changed into another prime (998979803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499489916 + 499489917.

It is an arithmetic number, because the mean of its divisors is an integer number (499489917).

Almost surely, 2^998979833 is an apocalyptic number.

It is an amenable number.

998979833 is a deficient number, since it is larger than the sum of its proper divisors (1).

998979833 is an equidigital number, since it uses as much as digits as its factorization.

998979833 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26453952, while the sum is 65.

The square root of 998979833 is about 31606.6422291265. The cubic root of 998979833 is about 999.6598286299.

The spelling of 998979833 in words is "nine hundred ninety-eight million, nine hundred seventy-nine thousand, eight hundred thirty-three".