489409873 has 2 divisors, whose sum is σ = 489409874. Its totient is φ = 489409872.

The previous prime is 489409853. The next prime is 489409903. The reversal of 489409873 is 378904984.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 488984769 + 425104 = 22113^2 + 652^2 .

It is a cyclic number.

It is not a de Polignac number, because 489409873 - 2²⁵ = 455855441 is a prime.

It is a super-2 number, since 2×489409873² = 479044047579752258, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 489409873.

It is not a weakly prime, because it can be changed into another prime (489409813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 244704936 + 244704937.

It is an arithmetic number, because the mean of its divisors is an integer number (244704937).

Almost surely, 2^489409873 is an apocalyptic number.

It is an amenable number.

489409873 is a deficient number, since it is larger than the sum of its proper divisors (1).

489409873 is an equidigital number, since it uses as much as digits as its factorization.

489409873 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1741824, while the sum is 52.

The square root of 489409873 is about 22122.6099952063. The cubic root of 489409873 is about 788.0568990367.

The spelling of 489409873 in words is "four hundred eighty-nine million, four hundred nine thousand, eight hundred seventy-three".