101009987 has 12 divisors (see below), whose sum is σ = 112672560. Its totient is φ = 90015072.

The previous prime is 101009983. The next prime is 101010031. The reversal of 101009987 is 789900101.

It is not a de Polignac number, because 101009987 - 2² = 101009983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (101009983) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6314 + ... + 15552.

It is an arithmetic number, because the mean of its divisors is an integer number (9389380).

Almost surely, 2^101009987 is an apocalyptic number.

101009987 is a deficient number, since it is larger than the sum of its proper divisors (11662573).

101009987 is an equidigital number, since it uses as much as digits as its factorization.

101009987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9310 (or 9281 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 35.

The square root of 101009987 is about 10050.3724806596. The cubic root of 101009987 is about 465.7162999623.

The spelling of 101009987 in words is "one hundred one million, nine thousand, nine hundred eighty-seven".