100923505 has 4 divisors (see below), whose sum is σ = 121108212. Its totient is φ = 80738800.

The previous prime is 100923499. The next prime is 100923521. The reversal of 100923505 is 505329001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 47983329 + 52940176 = 6927^2 + 7276^2 .

It is not a de Polignac number, because 100923505 - 2²⁵ = 67369073 is a prime.

It is a super-2 number, since 2×100923505² = 20371107722970050, which contains 22 as substring.

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 100923505.

It is an unprimeable number.

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, 10092346 + ... + 10092355.

It is an arithmetic number, because the mean of its divisors is an integer number (30277053).

Almost surely, 2^100923505 is an apocalyptic number.

It is an amenable number.

100923505 is a deficient number, since it is larger than the sum of its proper divisors (20184707).

100923505 is an equidigital number, since it uses as much as digits as its factorization.

100923505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20184706.

The product of its (nonzero) digits is 1350, while the sum is 25.

The square root of 100923505 is about 10046.0691317550. The cubic root of 100923505 is about 465.5833508083.

The spelling of 100923505 in words is "one hundred million, nine hundred twenty-three thousand, five hundred five".