321879481 has 27 divisors (see below), whose sum is σ = 413338863. Its totient is φ = 249738720.

The previous prime is 321879443. The next prime is 321879499. The reversal of 321879481 is 184978123.

The square root of 321879481 is 17941.

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

It can be written as a sum of positive squares in only one way, i.e., 65367225 + 256512256 = 8085^2 + 16016^2 .

It is not a de Polignac number, because 321879481 - 2¹³ = 321871289 is a prime.

It is a super-2 number, since 2×321879481² = 207212800577658722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (321879421) 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 26 ways as a sum of consecutive naturals, for example, 1381341 + ... + 1381573.

Almost surely, 2^321879481 is an apocalyptic number.

321879481 is the 17941-st square number.

321879481 is the 8971-st centered octagonal number.

It is an amenable number.

321879481 is a deficient number, since it is larger than the sum of its proper divisors (91459382).

321879481 is an equidigital number, since it uses as much as digits as its factorization.

321879481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502 (or 251 counting only the distinct ones).

The product of its digits is 96768, while the sum is 43.

The cubic root of 321879481 is about 685.3268768654.

The spelling of 321879481 in words is "three hundred twenty-one million, eight hundred seventy-nine thousand, four hundred eighty-one".