140640617 has 12 divisors (see below), whose sum is σ = 153412560. Its totient is φ = 128866608.

The previous prime is 140640593. The next prime is 140640623. The reversal of 140640617 is 716046041.

It is not a de Polignac number, because 140640617 - 2⁸ = 140640361 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 140640617.

It is not an unprimeable number, because it can be changed into a prime (140640637) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20498 + ... + 26484.

It is an arithmetic number, because the mean of its divisors is an integer number (12784380).

Almost surely, 2^140640617 is an apocalyptic number.

It is an amenable number.

140640617 is a deficient number, since it is larger than the sum of its proper divisors (12771943).

140640617 is a wasteful number, since it uses less digits than its factorization.

140640617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6152 (or 6139 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 140640617 is about 11859.1996778872. The cubic root of 140640617 is about 520.0402052247.

Adding to 140640617 its reverse (716046041), we get a palindrome (856686658).

The spelling of 140640617 in words is "one hundred forty million, six hundred forty thousand, six hundred seventeen".