140117987 has 2 divisors, whose sum is σ = 140117988. Its totient is φ = 140117986.

The previous prime is 140117981. The next prime is 140118019. The reversal of 140117987 is 789711041.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 140117987 - 2¹² = 140113891 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 140117987.

It is not a weakly prime, because it can be changed into another prime (140117981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70058993 + 70058994.

It is an arithmetic number, because the mean of its divisors is an integer number (70058994).

Almost surely, 2^140117987 is an apocalyptic number.

140117987 is a deficient number, since it is larger than the sum of its proper divisors (1).

140117987 is an equidigital number, since it uses as much as digits as its factorization.

140117987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14112, while the sum is 38.

The square root of 140117987 is about 11837.1443769179. The cubic root of 140117987 is about 519.3952375129.

The spelling of 140117987 in words is "one hundred forty million, one hundred seventeen thousand, nine hundred eighty-seven".