146281909 has 4 divisors (see below), whose sum is σ = 152642016. Its totient is φ = 139921804.

The previous prime is 146281903. The next prime is 146281921. The reversal of 146281909 is 909182641.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 146281909 - 2⁷ = 146281781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (146281903) 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 3 ways as a sum of consecutive naturals, for example, 3180019 + ... + 3180064.

It is an arithmetic number, because the mean of its divisors is an integer number (38160504).

Almost surely, 2^146281909 is an apocalyptic number.

It is an amenable number.

146281909 is a deficient number, since it is larger than the sum of its proper divisors (6360107).

146281909 is an equidigital number, since it uses as much as digits as its factorization.

146281909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6360106.

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 146281909 is about 12094.7058252774. The cubic root of 146281909 is about 526.9024360099.

The spelling of 146281909 in words is "one hundred forty-six million, two hundred eighty-one thousand, nine hundred nine".