146305091 has 4 divisors (see below), whose sum is σ = 146638800. Its totient is φ = 145971384.

The previous prime is 146305039. The next prime is 146305109. The reversal of 146305091 is 190503641.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 190503641 = 23 ⋅8282767.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-146305091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (146305021) 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, 166196 + ... + 167073.

It is an arithmetic number, because the mean of its divisors is an integer number (36659700).

Almost surely, 2^146305091 is an apocalyptic number.

146305091 is a deficient number, since it is larger than the sum of its proper divisors (333709).

146305091 is an equidigital number, since it uses as much as digits as its factorization.

146305091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333708.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 146305091 is about 12095.6641405092. The cubic root of 146305091 is about 526.9302681303.

The spelling of 146305091 in words is "one hundred forty-six million, three hundred five thousand, ninety-one".