100865087 has 2 divisors, whose sum is σ = 100865088. Its totient is φ = 100865086.

The previous prime is 100865077. The next prime is 100865099. The reversal of 100865087 is 780568001.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (780568001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 100865087 - 2⁸ = 100864831 is a prime.

It is a super-3 number, since 3×100865087³ (a number of 25 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100865027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50432543 + 50432544.

It is an arithmetic number, because the mean of its divisors is an integer number (50432544).

Almost surely, 2^100865087 is an apocalyptic number.

100865087 is a deficient number, since it is larger than the sum of its proper divisors (1).

100865087 is an equidigital number, since it uses as much as digits as its factorization.

100865087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13440, while the sum is 35.

The square root of 100865087 is about 10043.1612055169. The cubic root of 100865087 is about 465.4935015781.

The spelling of 100865087 in words is "one hundred million, eight hundred sixty-five thousand, eighty-seven".