309200143 has 12 divisors (see below), whose sum is σ = 368049000. Its totient is φ = 258863472.

The previous prime is 309200141. The next prime is 309200173. The reversal of 309200143 is 341002903.

It is not a de Polignac number, because 309200143 - 2¹ = 309200141 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 (309200141) 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 11 ways as a sum of consecutive naturals, for example, 71268 + ... + 75481.

It is an arithmetic number, because the mean of its divisors is an integer number (30670750).

Almost surely, 2^309200143 is an apocalyptic number.

309200143 is a deficient number, since it is larger than the sum of its proper divisors (58848857).

309200143 is a wasteful number, since it uses less digits than its factorization.

309200143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146806 (or 146799 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 309200143 is about 17584.0877784433. The cubic root of 309200143 is about 676.2073630331.

The spelling of 309200143 in words is "three hundred nine million, two hundred thousand, one hundred forty-three".