146991585 has 16 divisors (see below), whose sum is σ = 253278144. Its totient is φ = 72364992.

The previous prime is 146991583. The next prime is 146991613. The reversal of 146991585 is 585199641.

It is not a de Polignac number, because 146991585 - 2¹ = 146991583 is a prime.

It is not an unprimeable number, because it can be changed into a prime (146991583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 376707 + ... + 377096.

It is an arithmetic number, because the mean of its divisors is an integer number (15829884).

Almost surely, 2^146991585 is an apocalyptic number.

146991585 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

146991585 is a deficient number, since it is larger than the sum of its proper divisors (106286559).

146991585 is a wasteful number, since it uses less digits than its factorization.

146991585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 753824.

The product of its digits is 388800, while the sum is 48.

The square root of 146991585 is about 12124.0086192645. The cubic root of 146991585 is about 527.7531380146.

The spelling of 146991585 in words is "one hundred forty-six million, nine hundred ninety-one thousand, five hundred eighty-five".