140869987 has 4 divisors (see below), whose sum is σ = 141034840. Its totient is φ = 140705136.

The previous prime is 140869961. The next prime is 140869991. The reversal of 140869987 is 789968041.

It is a happy number.

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 140869987 - 2²³ = 132481379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140869997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81138 + ... + 82855.

It is an arithmetic number, because the mean of its divisors is an integer number (35258710).

Almost surely, 2^140869987 is an apocalyptic number.

140869987 is a deficient number, since it is larger than the sum of its proper divisors (164853).

140869987 is an equidigital number, since it uses as much as digits as its factorization.

140869987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164852.

The product of its (nonzero) digits is 870912, while the sum is 52.

The square root of 140869987 is about 11868.8662895830. The cubic root of 140869987 is about 520.3227618996.

The spelling of 140869987 in words is "one hundred forty million, eight hundred sixty-nine thousand, nine hundred eighty-seven".