146887889 has 12 divisors (see below), whose sum is σ = 152560548. Its totient is φ = 141419520.

The previous prime is 146887883. The next prime is 146887903. The reversal of 146887889 is 988788641.

It can be written as a sum of positive squares in 2 ways, for example, as 35796289 + 111091600 = 5983^2 + 10540^2 .

It is not a de Polignac number, because 146887889 - 2²⁰ = 145839313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (146887883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 339017 + ... + 339449.

It is an arithmetic number, because the mean of its divisors is an integer number (12713379).

Almost surely, 2^146887889 is an apocalyptic number.

It is an amenable number.

146887889 is a deficient number, since it is larger than the sum of its proper divisors (5672659).

146887889 is an equidigital number, since it uses as much as digits as its factorization.

146887889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 848 (or 817 counting only the distinct ones).

The product of its digits is 6193152, while the sum is 59.

The square root of 146887889 is about 12119.7313914129. The cubic root of 146887889 is about 527.6290067288.

The spelling of 146887889 in words is "one hundred forty-six million, eight hundred eighty-seven thousand, eight hundred eighty-nine".