100505065 has 4 divisors (see below), whose sum is σ = 120606084. Its totient is φ = 80404048.

The previous prime is 100505059. The next prime is 100505081. The reversal of 100505065 is 560505001.

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 49182169 + 51322896 = 7013^2 + 7164^2 .

It is a cyclic number.

It is not a de Polignac number, because 100505065 - 2³ = 100505057 is a prime.

It is a Duffinian number.

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, 10050502 + ... + 10050511.

It is an arithmetic number, because the mean of its divisors is an integer number (30151521).

Almost surely, 2^100505065 is an apocalyptic number.

It is an amenable number.

100505065 is a deficient number, since it is larger than the sum of its proper divisors (20101019).

100505065 is an equidigital number, since it uses as much as digits as its factorization.

100505065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20101018.

The product of its (nonzero) digits is 750, while the sum is 22.

The square root of 100505065 is about 10025.2214439383. The cubic root of 100505065 is about 464.9390061440.

The spelling of 100505065 in words is "one hundred million, five hundred five thousand, sixty-five".