321889426609 has 9 divisors (see below), whose sum is σ = 325297701057. Its totient is φ = 318516513024.

The previous prime is 321889426591. The next prime is 321889426619. The reversal of 321889426609 is 906624988123.

The square root of 321889426609 is 567353.

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 14831586225 + 307057840384 = 121785^2 + 554128^2 .

It is not a de Polignac number, because 321889426609 - 2⁵ = 321889426577 is a prime.

It is a super-2 number, since 2×321889426609² (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 (321889426619) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 55030317 + ... + 55036165.

Almost surely, 2^321889426609 is an apocalyptic number.

321889426609 is the 567353-rd square number.

321889426609 is the 283677-th centered octagonal number.

It is an amenable number.

321889426609 is a deficient number, since it is larger than the sum of its proper divisors (3408274448).

321889426609 is an frugal number, since it uses more digits than its factorization.

321889426609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11892 (or 5946 counting only the distinct ones).

The product of its (nonzero) digits is 8957952, while the sum is 58.

The spelling of 321889426609 in words is "three hundred twenty-one billion, eight hundred eighty-nine million, four hundred twenty-six thousand, six hundred nine".