140442293 has 4 divisors (see below), whose sum is σ = 140466240. Its totient is φ = 140418348.

The previous prime is 140442283. The next prime is 140442299. The reversal of 140442293 is 392244041.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 140442293 - 2⁴ = 140442277 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140442299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3428 + ... + 17106.

It is an arithmetic number, because the mean of its divisors is an integer number (35116560).

Almost surely, 2^140442293 is an apocalyptic number.

It is an amenable number.

140442293 is a deficient number, since it is larger than the sum of its proper divisors (23947).

140442293 is a wasteful number, since it uses less digits than its factorization.

140442293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23946.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 140442293 is about 11850.8351182522. The cubic root of 140442293 is about 519.7956457864.

The spelling of 140442293 in words is "one hundred forty million, four hundred forty-two thousand, two hundred ninety-three".