998642629 has 2 divisors, whose sum is σ = 998642630. Its totient is φ = 998642628.

The previous prime is 998642597. The next prime is 998642647. The reversal of 998642629 is 926246899.

998642629 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 928116225 + 70526404 = 30465^2 + 8398^2 .

It is a cyclic number.

It is not a de Polignac number, because 998642629 - 2⁵ = 998642597 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 998642629.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (998642929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499321314 + 499321315.

It is an arithmetic number, because the mean of its divisors is an integer number (499321315).

Almost surely, 2^998642629 is an apocalyptic number.

It is an amenable number.

998642629 is a deficient number, since it is larger than the sum of its proper divisors (1).

998642629 is an equidigital number, since it uses as much as digits as its factorization.

998642629 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3359232, while the sum is 55.

The square root of 998642629 is about 31601.3073938405. The cubic root of 998642629 is about 999.5473381281.

The spelling of 998642629 in words is "nine hundred ninety-eight million, six hundred forty-two thousand, six hundred twenty-nine".