140343309 has 24 divisors (see below), whose sum is σ = 212808960. Its totient is φ = 88954272.

The previous prime is 140343239. The next prime is 140343323. The reversal of 140343309 is 903343041.

140343309 is a `hidden beast` number, since 14 + 0 + 343 + 309 = 666.

It is not a de Polignac number, because 140343309 - 2²⁰ = 139294733 is a prime.

It is a super-3 number, since 3×140343309³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140343409) 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 23 ways as a sum of consecutive naturals, for example, 33852 + ... + 37770.

It is an arithmetic number, because the mean of its divisors is an integer number (8867040).

Almost surely, 2^140343309 is an apocalyptic number.

It is an amenable number.

140343309 is a deficient number, since it is larger than the sum of its proper divisors (72465651).

140343309 is a wasteful number, since it uses less digits than its factorization.

140343309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4121 (or 4118 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

The square root of 140343309 is about 11846.6581363691. The cubic root of 140343309 is about 519.6734994264.

The spelling of 140343309 in words is "one hundred forty million, three hundred forty-three thousand, three hundred nine".