485188889 has 4 divisors (see below), whose sum is σ = 485253924. Its totient is φ = 485123856.

The previous prime is 485188877. The next prime is 485188901. The reversal of 485188889 is 988881584.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (485188877) and next prime (485188901).

It can be written as a sum of positive squares in 2 ways, for example, as 390457600 + 94731289 = 19760^2 + 9733^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-485188889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (485188819) 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, 19622 + ... + 36815.

It is an arithmetic number, because the mean of its divisors is an integer number (121313481).

Almost surely, 2^485188889 is an apocalyptic number.

It is an amenable number.

485188889 is a deficient number, since it is larger than the sum of its proper divisors (65035).

485188889 is an equidigital number, since it uses as much as digits as its factorization.

485188889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65034.

The product of its digits is 5898240, while the sum is 59.

The square root of 485188889 is about 22027.0036319060. The cubic root of 485188889 is about 785.7847853734.

The spelling of 485188889 in words is "four hundred eighty-five million, one hundred eighty-eight thousand, eight hundred eighty-nine".