10117987 has 4 divisors (see below), whose sum is σ = 11037816. Its totient is φ = 9198160.

The previous prime is 10117957. The next prime is 10117993. The reversal of 10117987 is 78971101.

10117987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 10117987 - 2²³ = 1729379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10117957) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 459898 + ... + 459919.

It is an arithmetic number, because the mean of its divisors is an integer number (2759454).

Almost surely, 2^10117987 is an apocalyptic number.

10117987 is a deficient number, since it is larger than the sum of its proper divisors (919829).

10117987 is an equidigital number, since it uses as much as digits as its factorization.

10117987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 919828.

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

The square root of 10117987 is about 3180.8783378180. The cubic root of 10117987 is about 216.2874758801.

It can be divided in two parts, 1011 and 7987, that added together give a palindrome (8998).

The spelling of 10117987 in words is "ten million, one hundred seventeen thousand, nine hundred eighty-seven".