140344423 has 4 divisors (see below), whose sum is σ = 140543080. Its totient is φ = 140145768.

The previous prime is 140344387. The next prime is 140344433. The reversal of 140344423 is 324443041.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 140344423 - 2⁹ = 140343911 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140344433) 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, 98265 + ... + 99682.

It is an arithmetic number, because the mean of its divisors is an integer number (35135770).

Almost surely, 2^140344423 is an apocalyptic number.

140344423 is a deficient number, since it is larger than the sum of its proper divisors (198657).

140344423 is an equidigital number, since it uses as much as digits as its factorization.

140344423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198656.

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 140344423 is about 11846.7051537548. The cubic root of 140344423 is about 519.6748744231.

Adding to 140344423 its reverse (324443041), we get a palindrome (464787464).

The spelling of 140344423 in words is "one hundred forty million, three hundred forty-four thousand, four hundred twenty-three".