100780585 has 4 divisors (see below), whose sum is σ = 120936708. Its totient is φ = 80624464.

The previous prime is 100780567. The next prime is 100780591. The reversal of 100780585 is 585087001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 585087001 = 139 ⋅4209259.

It can be written as a sum of positive squares in 2 ways, for example, as 44515584 + 56265001 = 6672^2 + 7501^2 .

It is a cyclic number.

It is not a de Polignac number, because 100780585 - 2⁵ = 100780553 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 100780585.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10078054 + ... + 10078063.

It is an arithmetic number, because the mean of its divisors is an integer number (30234177).

Almost surely, 2^100780585 is an apocalyptic number.

It is an amenable number.

100780585 is a deficient number, since it is larger than the sum of its proper divisors (20156123).

100780585 is an equidigital number, since it uses as much as digits as its factorization.

100780585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20156122.

The product of its (nonzero) digits is 11200, while the sum is 34.

The square root of 100780585 is about 10038.9533817027. The cubic root of 100780585 is about 465.3634727023.

The spelling of 100780585 in words is "one hundred million, seven hundred eighty thousand, five hundred eighty-five".