100839887 has 4 divisors (see below), whose sum is σ = 101017680. Its totient is φ = 100662096.

The previous prime is 100839883. The next prime is 100839899. The reversal of 100839887 is 788938001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 788938001 = 11059 ⋅71339.

It is a cyclic number.

It is not a de Polignac number, because 100839887 - 2² = 100839883 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100839881) 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 3 ways as a sum of consecutive naturals, for example, 88043 + ... + 89180.

It is an arithmetic number, because the mean of its divisors is an integer number (25254420).

Almost surely, 2^100839887 is an apocalyptic number.

100839887 is a deficient number, since it is larger than the sum of its proper divisors (177793).

100839887 is an equidigital number, since it uses as much as digits as its factorization.

100839887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177792.

The product of its (nonzero) digits is 96768, while the sum is 44.

The square root of 100839887 is about 10041.9065420865. The cubic root of 100839887 is about 465.4547322556.

The spelling of 100839887 in words is "one hundred million, eight hundred thirty-nine thousand, eight hundred eighty-seven".