140540729 has 4 divisors (see below), whose sum is σ = 160617984. Its totient is φ = 120463476.

The previous prime is 140540723. The next prime is 140540731. The reversal of 140540729 is 927045041.

It is a happy number.

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 not a de Polignac number, because 140540729 - 2⁴ = 140540713 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 140540695 and 140540704.

It is not an unprimeable number, because it can be changed into a prime (140540723) 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, 10038617 + ... + 10038630.

It is an arithmetic number, because the mean of its divisors is an integer number (40154496).

Almost surely, 2^140540729 is an apocalyptic number.

It is an amenable number.

140540729 is a deficient number, since it is larger than the sum of its proper divisors (20077255).

140540729 is an equidigital number, since it uses as much as digits as its factorization.

140540729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20077254.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 140540729 is about 11854.9875158095. The cubic root of 140540729 is about 519.9170590101.

The spelling of 140540729 in words is "one hundred forty million, five hundred forty thousand, seven hundred twenty-nine".