100619987 has 8 divisors (see below), whose sum is σ = 109666704. Its totient is φ = 91759968.

The previous prime is 100619977. The next prime is 100619989. The reversal of 100619987 is 789916001.

It is a happy number.

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-100619987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100619989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45548 + ... + 47705.

It is an arithmetic number, because the mean of its divisors is an integer number (13708338).

Almost surely, 2^100619987 is an apocalyptic number.

100619987 is a deficient number, since it is larger than the sum of its proper divisors (9046717).

100619987 is an equidigital number, since it uses as much as digits as its factorization.

100619987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93349.

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

The square root of 100619987 is about 10030.9514503860. The cubic root of 100619987 is about 465.1161493490.

The spelling of 100619987 in words is "one hundred million, six hundred nineteen thousand, nine hundred eighty-seven".