146189947 has 4 divisors (see below), whose sum is σ = 146233720. Its totient is φ = 146146176.

The previous prime is 146189941. The next prime is 146189999. The reversal of 146189947 is 749981641.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-146189947 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 146189947.

It is not an unprimeable number, because it can be changed into a prime (146189941) by changing a digit.

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, 16422 + ... + 23707.

It is an arithmetic number, because the mean of its divisors is an integer number (36558430).

Almost surely, 2^146189947 is an apocalyptic number.

146189947 is a deficient number, since it is larger than the sum of its proper divisors (43773).

146189947 is an equidigital number, since it uses as much as digits as its factorization.

146189947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43772.

The product of its digits is 435456, while the sum is 49.

The square root of 146189947 is about 12090.9034815435. The cubic root of 146189947 is about 526.7919982038.

The spelling of 146189947 in words is "one hundred forty-six million, one hundred eighty-nine thousand, nine hundred forty-seven".