998172433 has 2 divisors, whose sum is σ = 998172434. Its totient is φ = 998172432.

The previous prime is 998172419. The next prime is 998172437. The reversal of 998172433 is 334271899.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 703947024 + 294225409 = 26532^2 + 17153^2 .

It is a cyclic number.

It is not a de Polignac number, because 998172433 - 2⁵ = 998172401 is a prime.

It is a super-2 number, since 2×998172433² = 1992696412002278978, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (998172437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499086216 + 499086217.

It is an arithmetic number, because the mean of its divisors is an integer number (499086217).

Almost surely, 2^998172433 is an apocalyptic number.

It is an amenable number.

998172433 is a deficient number, since it is larger than the sum of its proper divisors (1).

998172433 is an equidigital number, since it uses as much as digits as its factorization.

998172433 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 46.

The square root of 998172433 is about 31593.8670156092. The cubic root of 998172433 is about 999.3904395115.

The spelling of 998172433 in words is "nine hundred ninety-eight million, one hundred seventy-two thousand, four hundred thirty-three".