140378729 has 4 divisors (see below), whose sum is σ = 146482176. Its totient is φ = 134275284.

The previous prime is 140378699. The next prime is 140378747. The reversal of 140378729 is 927873041.

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, and also an emirpimes, since its reverse is a distinct semiprime: 927873041 = 5387 ⋅172243.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140378729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140371729) 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, 3051689 + ... + 3051734.

It is an arithmetic number, because the mean of its divisors is an integer number (36620544).

Almost surely, 2^140378729 is an apocalyptic number.

It is an amenable number.

140378729 is a deficient number, since it is larger than the sum of its proper divisors (6103447).

140378729 is an equidigital number, since it uses as much as digits as its factorization.

140378729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6103446.

The product of its (nonzero) digits is 84672, while the sum is 41.

The square root of 140378729 is about 11848.1529784182. The cubic root of 140378729 is about 519.7172143404.

The spelling of 140378729 in words is "one hundred forty million, three hundred seventy-eight thousand, seven hundred twenty-nine".