100781867 has 4 divisors (see below), whose sum is σ = 100815120. Its totient is φ = 100748616.

The previous prime is 100781861. The next prime is 100781881. The reversal of 100781867 is 768187001.

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 100781867 - 2⁶ = 100781803 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 100781867.

It is not an unprimeable number, because it can be changed into a prime (100781861) 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, 11567 + ... + 18312.

It is an arithmetic number, because the mean of its divisors is an integer number (25203780).

Almost surely, 2^100781867 is an apocalyptic number.

100781867 is a deficient number, since it is larger than the sum of its proper divisors (33253).

100781867 is an equidigital number, since it uses as much as digits as its factorization.

100781867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33252.

The product of its (nonzero) digits is 18816, while the sum is 38.

The square root of 100781867 is about 10039.0172327773. The cubic root of 100781867 is about 465.3654459443.

The spelling of 100781867 in words is "one hundred million, seven hundred eighty-one thousand, eight hundred sixty-seven".