140631987 has 8 divisors (see below), whose sum is σ = 190687680. Its totient is φ = 92165480.

The previous prime is 140631979. The next prime is 140631989. The reversal of 140631987 is 789136041.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 140631987 - 2³ = 140631979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (140631989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 397089 + ... + 397442.

It is an arithmetic number, because the mean of its divisors is an integer number (23835960).

Almost surely, 2^140631987 is an apocalyptic number.

140631987 is a deficient number, since it is larger than the sum of its proper divisors (50055693).

140631987 is an equidigital number, since it uses as much as digits as its factorization.

140631987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 794593.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 140631987 is about 11858.8358197590. The cubic root of 140631987 is about 520.0295680919.

The spelling of 140631987 in words is "one hundred forty million, six hundred thirty-one thousand, nine hundred eighty-seven".