140945393 has 4 divisors (see below), whose sum is σ = 142238580. Its totient is φ = 139652208.

The previous prime is 140945377. The next prime is 140945417. The reversal of 140945393 is 393549041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 393549041 = 311 ⋅1265431.

It can be written as a sum of positive squares in 2 ways, for example, as 57259489 + 83685904 = 7567^2 + 9148^2 .

It is a cyclic number.

It is not a de Polignac number, because 140945393 - 2⁴ = 140945377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140945333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 646430 + ... + 646647.

It is an arithmetic number, because the mean of its divisors is an integer number (35559645).

Almost surely, 2^140945393 is an apocalyptic number.

It is an amenable number.

140945393 is a deficient number, since it is larger than the sum of its proper divisors (1293187).

140945393 is a wasteful number, since it uses less digits than its factorization.

140945393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1293186.

The product of its (nonzero) digits is 58320, while the sum is 38.

The square root of 140945393 is about 11872.0424948700. The cubic root of 140945393 is about 520.4155861658.

The spelling of 140945393 in words is "one hundred forty million, nine hundred forty-five thousand, three hundred ninety-three".