104192987 has 4 divisors (see below), whose sum is σ = 104293176. Its totient is φ = 104092800.

The previous prime is 104192981. The next prime is 104192993. The reversal of 104192987 is 789291401.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 789291401 = 1549 ⋅509549.

It is an interprime number because it is at equal distance from previous prime (104192981) and next prime (104192993).

It is a cyclic number.

It is not a de Polignac number, because 104192987 - 2⁸ = 104192731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (104192981) 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, 48518 + ... + 50619.

It is an arithmetic number, because the mean of its divisors is an integer number (26073294).

Almost surely, 2^104192987 is an apocalyptic number.

104192987 is a deficient number, since it is larger than the sum of its proper divisors (100189).

104192987 is an equidigital number, since it uses as much as digits as its factorization.

104192987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100188.

The product of its (nonzero) digits is 36288, while the sum is 41.

The square root of 104192987 is about 10207.4966078858. The cubic root of 104192987 is about 470.5576405143.

The spelling of 104192987 in words is "one hundred four million, one hundred ninety-two thousand, nine hundred eighty-seven".