104987987 has 4 divisors (see below), whose sum is σ = 113064000. Its totient is φ = 96911976.

The previous prime is 104987959. The next prime is 104987999. The reversal of 104987987 is 789789401.

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 104987987 - 2⁶ = 104987923 is a prime.

It is a super-2 number, since 2×104987987² = 22044954828624338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (104987957) 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, 4037987 + ... + 4038012.

It is an arithmetic number, because the mean of its divisors is an integer number (28266000).

Almost surely, 2^104987987 is an apocalyptic number.

104987987 is a deficient number, since it is larger than the sum of its proper divisors (8076013).

104987987 is an equidigital number, since it uses as much as digits as its factorization.

104987987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8076012.

The product of its (nonzero) digits is 1016064, while the sum is 53.

The square root of 104987987 is about 10246.3645748138. The cubic root of 104987987 is about 471.7514057081.

The spelling of 104987987 in words is "one hundred four million, nine hundred eighty-seven thousand, nine hundred eighty-seven".