146689885 has 4 divisors (see below), whose sum is σ = 176027868. Its totient is φ = 117351904.

The previous prime is 146689853. The next prime is 146689901. The reversal of 146689885 is 588986641.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 588986641 = 17 ⋅34646273.

It can be written as a sum of positive squares in 2 ways, for example, as 42588676 + 104101209 = 6526^2 + 10203^2 .

It is a cyclic number.

It is not a de Polignac number, because 146689885 - 2⁵ = 146689853 is a prime.

It is a super-2 number, since 2×146689885² = 43035844722626450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14668984 + ... + 14668993.

It is an arithmetic number, because the mean of its divisors is an integer number (44006967).

Almost surely, 2^146689885 is an apocalyptic number.

It is an amenable number.

146689885 is a deficient number, since it is larger than the sum of its proper divisors (29337983).

146689885 is an equidigital number, since it uses as much as digits as its factorization.

146689885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29337982.

The product of its digits is 3317760, while the sum is 55.

The square root of 146689885 is about 12111.5599738432. The cubic root of 146689885 is about 527.3918198679.

The spelling of 146689885 in words is "one hundred forty-six million, six hundred eighty-nine thousand, eight hundred eighty-five".