101017987 has 8 divisors (see below), whose sum is σ = 116117856. Its totient is φ = 86085312.

The previous prime is 101017963. The next prime is 101017999. The reversal of 101017987 is 789710101.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101017987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101017907) 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 7 ways as a sum of consecutive naturals, for example, 40498 + ... + 42919.

It is an arithmetic number, because the mean of its divisors is an integer number (14514732).

Almost surely, 2^101017987 is an apocalyptic number.

101017987 is a deficient number, since it is larger than the sum of its proper divisors (15099869).

101017987 is an equidigital number, since it uses as much as digits as its factorization.

101017987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83597.

The product of its (nonzero) digits is 3528, while the sum is 34.

The square root of 101017987 is about 10050.7704679791. The cubic root of 101017987 is about 465.7285945619.

The spelling of 101017987 in words is "one hundred one million, seventeen thousand, nine hundred eighty-seven".