105480209 has 4 divisors (see below), whose sum is σ = 105682416. Its totient is φ = 105278004.

The previous prime is 105480187. The next prime is 105480217. The reversal of 105480209 is 902084501.

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, and also an emirpimes, since its reverse is a distinct semiprime: 902084501 = 41 ⋅22002061.

It is a cyclic number.

It is not a de Polignac number, because 105480209 - 2⁸ = 105479953 is a prime.

It is a super-2 number, since 2×105480209² = 22252148981367362, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (105480239) 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, 100319 + ... + 101364.

It is an arithmetic number, because the mean of its divisors is an integer number (26420604).

Almost surely, 2^105480209 is an apocalyptic number.

It is an amenable number.

105480209 is a deficient number, since it is larger than the sum of its proper divisors (202207).

105480209 is an equidigital number, since it uses as much as digits as its factorization.

105480209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202206.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 105480209 is about 10270.3558360945. The cubic root of 105480209 is about 472.4875041254.

The spelling of 105480209 in words is "one hundred five million, four hundred eighty thousand, two hundred nine".