998531069 has 2 divisors, whose sum is σ = 998531070. Its totient is φ = 998531068.

The previous prime is 998531063. The next prime is 998531081. The reversal of 998531069 is 960135899.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 732351844 + 266179225 = 27062^2 + 16315^2 .

It is an emirp because it is prime and its reverse (960135899) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 998531069 - 2¹² = 998526973 is a prime.

It is a super-2 number, since 2×998531069² = 1994128591516565522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (998531063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499265534 + 499265535.

It is an arithmetic number, because the mean of its divisors is an integer number (499265535).

Almost surely, 2^998531069 is an apocalyptic number.

It is an amenable number.

998531069 is a deficient number, since it is larger than the sum of its proper divisors (1).

998531069 is an equidigital number, since it uses as much as digits as its factorization.

998531069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 524880, while the sum is 50.

The square root of 998531069 is about 31599.5422276969. The cubic root of 998531069 is about 999.5101163866.

The spelling of 998531069 in words is "nine hundred ninety-eight million, five hundred thirty-one thousand, sixty-nine".