100169987 has 4 divisors (see below), whose sum is σ = 100281336. Its totient is φ = 100058640.

The previous prime is 100169983. The next prime is 100169999. The reversal of 100169987 is 789961001.

It is a happy number.

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 100169987 - 2² = 100169983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100169983) 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, 54314 + ... + 56127.

It is an arithmetic number, because the mean of its divisors is an integer number (25070334).

Almost surely, 2^100169987 is an apocalyptic number.

100169987 is a deficient number, since it is larger than the sum of its proper divisors (111349).

100169987 is an equidigital number, since it uses as much as digits as its factorization.

100169987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111348.

The product of its (nonzero) digits is 27216, while the sum is 41.

The square root of 100169987 is about 10008.4957411191. The cubic root of 100169987 is about 464.4217377318.

The spelling of 100169987 in words is "one hundred million, one hundred sixty-nine thousand, nine hundred eighty-seven".