140440207 has 4 divisors (see below), whose sum is σ = 141465456. Its totient is φ = 139414960.

The previous prime is 140440169. The next prime is 140440217. The reversal of 140440207 is 702044041.

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 140440207 - 2¹¹ = 140438159 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140440217) 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, 512419 + ... + 512692.

It is an arithmetic number, because the mean of its divisors is an integer number (35366364).

Almost surely, 2^140440207 is an apocalyptic number.

140440207 is a deficient number, since it is larger than the sum of its proper divisors (1025249).

140440207 is a wasteful number, since it uses less digits than its factorization.

140440207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1025248.

The product of its (nonzero) digits is 896, while the sum is 22.

The square root of 140440207 is about 11850.7471072502. The cubic root of 140440207 is about 519.7930722523.

Adding to 140440207 its reverse (702044041), we get a palindrome (842484248).

The spelling of 140440207 in words is "one hundred forty million, four hundred forty thousand, two hundred seven".