140186971 has 4 divisors (see below), whose sum is σ = 141473200. Its totient is φ = 138900744.

The previous prime is 140186941. The next prime is 140186989. The reversal of 140186971 is 179681041.

140186971 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 140186971 - 2⁵ = 140186939 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 140186971.

It is not an unprimeable number, because it can be changed into a prime (140186941) 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, 642951 + ... + 643168.

It is an arithmetic number, because the mean of its divisors is an integer number (35368300).

Almost surely, 2^140186971 is an apocalyptic number.

140186971 is a deficient number, since it is larger than the sum of its proper divisors (1286229).

140186971 is a wasteful number, since it uses less digits than its factorization.

140186971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1286228.

The product of its (nonzero) digits is 12096, while the sum is 37.

The square root of 140186971 is about 11840.0578968179. The cubic root of 140186971 is about 519.4804611243.

The spelling of 140186971 in words is "one hundred forty million, one hundred eighty-six thousand, nine hundred seventy-one".