321560489 has 4 divisors (see below), whose sum is σ = 331933440. Its totient is φ = 311187540.

The previous prime is 321560483. The next prime is 321560501. The reversal of 321560489 is 984065123.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 321560489 - 2²⁰ = 320511913 is a prime.

It is a super-2 number, since 2×321560489² = 206802296171838242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321560483) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5186429 + ... + 5186490.

It is an arithmetic number, because the mean of its divisors is an integer number (82983360).

Almost surely, 2^321560489 is an apocalyptic number.

It is an amenable number.

321560489 is a deficient number, since it is larger than the sum of its proper divisors (10372951).

321560489 is a wasteful number, since it uses less digits than its factorization.

321560489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10372950.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 321560489 is about 17932.1077679117. The cubic root of 321560489 is about 685.1004090295.

The spelling of 321560489 in words is "three hundred twenty-one million, five hundred sixty thousand, four hundred eighty-nine".