489591969 has 4 divisors (see below), whose sum is σ = 652789296. Its totient is φ = 326394644.

The previous prime is 489591953. The next prime is 489591983. The reversal of 489591969 is 969195984.

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 489591969 - 2⁴ = 489591953 is a prime.

It is a super-2 number, since 2×489591969² = 479400592218593922, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (489591929) 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, 81598659 + ... + 81598664.

It is an arithmetic number, because the mean of its divisors is an integer number (163197324).

Almost surely, 2^489591969 is an apocalyptic number.

It is an amenable number.

489591969 is a deficient number, since it is larger than the sum of its proper divisors (163197327).

489591969 is a wasteful number, since it uses less digits than its factorization.

489591969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163197326.

The product of its digits is 6298560, while the sum is 60.

The square root of 489591969 is about 22126.7252208726. The cubic root of 489591969 is about 788.1546250417.

The spelling of 489591969 in words is "four hundred eighty-nine million, five hundred ninety-one thousand, nine hundred sixty-nine".