146505889 has 4 divisors (see below), whose sum is σ = 147489300. Its totient is φ = 145522480.

The previous prime is 146505869. The next prime is 146505893. The reversal of 146505889 is 988505641.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6864400 + 139641489 = 2620^2 + 11817^2 .

It is a cyclic number.

It is not a de Polignac number, because 146505889 - 2⁵ = 146505857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (146505869) 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 3 ways as a sum of consecutive naturals, for example, 491482 + ... + 491779.

It is an arithmetic number, because the mean of its divisors is an integer number (36872325).

Almost surely, 2^146505889 is an apocalyptic number.

It is an amenable number.

146505889 is a deficient number, since it is larger than the sum of its proper divisors (983411).

146505889 is an equidigital number, since it uses as much as digits as its factorization.

146505889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 983410.

The product of its (nonzero) digits is 345600, while the sum is 46.

The square root of 146505889 is about 12103.9617068132. The cubic root of 146505889 is about 527.1712216406.

The spelling of 146505889 in words is "one hundred forty-six million, five hundred five thousand, eight hundred eighty-nine".