489897591 has 16 divisors (see below), whose sum is σ = 678412800. Its totient is φ = 314226368.

The previous prime is 489897589. The next prime is 489897593. The reversal of 489897591 is 195798984.

It is an interprime number because it is at equal distance from previous prime (489897589) and next prime (489897593).

It is a cyclic number.

It is not a de Polignac number, because 489897591 - 2¹ = 489897589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (489897593) 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 15 ways as a sum of consecutive naturals, for example, 21126 + ... + 37763.

It is an arithmetic number, because the mean of its divisors is an integer number (42400800).

Almost surely, 2^489897591 is an apocalyptic number.

489897591 is a deficient number, since it is larger than the sum of its proper divisors (188515209).

489897591 is a wasteful number, since it uses less digits than its factorization.

489897591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58998.

The product of its digits is 6531840, while the sum is 60.

The square root of 489897591 is about 22133.6303167826. The cubic root of 489897591 is about 788.3185896652.

The spelling of 489897591 in words is "four hundred eighty-nine million, eight hundred ninety-seven thousand, five hundred ninety-one".