100836865 has 8 divisors (see below), whose sum is σ = 121061160. Its totient is φ = 80631552.

The previous prime is 100836859. The next prime is 100836889. The reversal of 100836865 is 568638001.

It can be written as a sum of positive squares in 4 ways, for example, as 19998784 + 80838081 = 4472^2 + 8991^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 100836865 - 2⁷ = 100836737 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12951 + ... + 19219.

It is an arithmetic number, because the mean of its divisors is an integer number (15132645).

Almost surely, 2^100836865 is an apocalyptic number.

It is an amenable number.

100836865 is a deficient number, since it is larger than the sum of its proper divisors (20224295).

100836865 is an equidigital number, since it uses as much as digits as its factorization.

100836865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9491.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 100836865 is about 10041.7560715245. The cubic root of 100836865 is about 465.4500825801.

It can be divided in two parts, 1008 and 36865, that added together give a palindrome (37873).

The spelling of 100836865 in words is "one hundred million, eight hundred thirty-six thousand, eight hundred sixty-five".