331698820489 has 9 divisors (see below), whose sum is σ = 332880791637. Its totient is φ = 330521037504.

The previous prime is 331698820487. The next prime is 331698820499. The reversal of 331698820489 is 984028896133.

The square root of 331698820489 is 575933.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 98498684025 + 233200136464 = 313845^2 + 482908^2 .

It is not a de Polignac number, because 331698820489 - 2¹ = 331698820487 is a prime.

It is a super-2 number, since 2×331698820489² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (331698820487) 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 in 8 ways as a sum of consecutive naturals, for example, 194088567 + ... + 194090275.

Almost surely, 2^331698820489 is an apocalyptic number.

331698820489 is the 575933-rd square number.

331698820489 is the 287967-th centered octagonal number.

It is an amenable number.

331698820489 is a deficient number, since it is larger than the sum of its proper divisors (1181971148).

331698820489 is an frugal number, since it uses more digits than its factorization.

331698820489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4092 (or 2046 counting only the distinct ones).

The product of its (nonzero) digits is 17915904, while the sum is 61.

The spelling of 331698820489 in words is "three hundred thirty-one billion, six hundred ninety-eight million, eight hundred twenty thousand, four hundred eighty-nine".