10505109 has 4 divisors (see below), whose sum is σ = 14006816. Its totient is φ = 7003404.

The previous prime is 10505107. The next prime is 10505113. The reversal of 10505109 is 90150501.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 10505109 - 2¹ = 10505107 is a prime.

It is a super-2 number, since 2×10505109² = 220714630203762, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10505101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1750849 + ... + 1750854.

It is an arithmetic number, because the mean of its divisors is an integer number (3501704).

Almost surely, 2^10505109 is an apocalyptic number.

It is an amenable number.

10505109 is a deficient number, since it is larger than the sum of its proper divisors (3501707).

10505109 is an equidigital number, since it uses as much as digits as its factorization.

10505109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3501706.

The product of its (nonzero) digits is 225, while the sum is 21.

The square root of 10505109 is about 3241.1585891468. The cubic root of 10505109 is about 219.0114670504.

It can be divided in two parts, 1050 and 5109, that multiplied together give a triangular number (5364450 = T₃₂₇₅).

The spelling of 10505109 in words is "ten million, five hundred five thousand, one hundred nine".