140843887 has 4 divisors (see below), whose sum is σ = 140982856. Its totient is φ = 140704920.

The previous prime is 140843869. The next prime is 140843909. The reversal of 140843887 is 788348041.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140843887 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 (140843687) 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, 67953 + ... + 69994.

It is an arithmetic number, because the mean of its divisors is an integer number (35245714).

Almost surely, 2^140843887 is an apocalyptic number.

140843887 is a deficient number, since it is larger than the sum of its proper divisors (138969).

140843887 is a wasteful number, since it uses less digits than its factorization.

140843887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138968.

The product of its (nonzero) digits is 172032, while the sum is 43.

The square root of 140843887 is about 11867.7667233562. The cubic root of 140843887 is about 520.2906252627.

It can be divided in two parts, 14084 and 3887, that added together give a palindrome (17971).

The spelling of 140843887 in words is "one hundred forty million, eight hundred forty-three thousand, eight hundred eighty-seven".