140505169 has 16 divisors (see below), whose sum is σ = 165675136. Its totient is φ = 116640000.

The previous prime is 140505163. The next prime is 140505181. The reversal of 140505169 is 961505041.

140505169 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 140505169 - 2³ = 140505161 is a prime.

It is a super-2 number, since 2×140505169² = 39483405031437122, which contains 22 as substring.

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 140505169.

It is not an unprimeable number, because it can be changed into a prime (140505161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61294 + ... + 63544.

It is an arithmetic number, because the mean of its divisors is an integer number (10354696).

Almost surely, 2^140505169 is an apocalyptic number.

It is an amenable number.

140505169 is a deficient number, since it is larger than the sum of its proper divisors (25169967).

140505169 is a wasteful number, since it uses less digits than its factorization.

140505169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2536.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 140505169 is about 11853.4876302293. The cubic root of 140505169 is about 519.8732050320.

The spelling of 140505169 in words is "one hundred forty million, five hundred five thousand, one hundred sixty-nine".