100998987 has 8 divisors (see below), whose sum is σ = 135145680. Its totient is φ = 67092480.

The previous prime is 100998983. The next prime is 100999001. The reversal of 100998987 is 789899001.

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

It is not a de Polignac number, because 100998987 - 2² = 100998983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (100998983) 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 in 7 ways as a sum of consecutive naturals, for example, 59062 + ... + 60747.

It is an arithmetic number, because the mean of its divisors is an integer number (16893210).

Almost surely, 2^100998987 is an apocalyptic number.

100998987 is a deficient number, since it is larger than the sum of its proper divisors (34146693).

100998987 is a wasteful number, since it uses less digits than its factorization.

100998987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120093.

The product of its (nonzero) digits is 326592, while the sum is 51.

The square root of 100998987 is about 10049.8252223608. The cubic root of 100998987 is about 465.6993938278.

The spelling of 100998987 in words is "one hundred million, nine hundred ninety-eight thousand, nine hundred eighty-seven".