998971529 has 2 divisors, whose sum is σ = 998971530. Its totient is φ = 998971528.

The previous prime is 998971517. The next prime is 998971537. The reversal of 998971529 is 925179899.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 902401600 + 96569929 = 30040^2 + 9827^2 .

It is a cyclic number.

It is not a de Polignac number, because 998971529 - 2⁴ = 998971513 is a prime.

It is not a weakly prime, because it can be changed into another prime (998976529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499485764 + 499485765.

It is an arithmetic number, because the mean of its divisors is an integer number (499485765).

Almost surely, 2^998971529 is an apocalyptic number.

It is an amenable number.

998971529 is a deficient number, since it is larger than the sum of its proper divisors (1).

998971529 is an equidigital number, since it uses as much as digits as its factorization.

998971529 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3674160, while the sum is 59.

The square root of 998971529 is about 31606.5108640609. The cubic root of 998971529 is about 999.6570587381.

It can be divided in two parts, 9989 and 71529, that added together give a palindrome (81518).

The spelling of 998971529 in words is "nine hundred ninety-eight million, nine hundred seventy-one thousand, five hundred twenty-nine".