105025909 has 4 divisors (see below), whose sum is σ = 107468416. Its totient is φ = 102583404.

The previous prime is 105025891. The next prime is 105025919. The reversal of 105025909 is 909520501.

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: 909520501 = 31 ⋅29339371.

It is a cyclic number.

It is not a de Polignac number, because 105025909 - 2⁹ = 105025397 is a prime.

It is a super-2 number, since 2×105025909² = 22060883122552562, 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 (105025919) 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, 1221189 + ... + 1221274.

It is an arithmetic number, because the mean of its divisors is an integer number (26867104).

Almost surely, 2^105025909 is an apocalyptic number.

It is an amenable number.

105025909 is a deficient number, since it is larger than the sum of its proper divisors (2442507).

105025909 is an equidigital number, since it uses as much as digits as its factorization.

105025909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2442506.

The product of its (nonzero) digits is 4050, while the sum is 31.

The square root of 105025909 is about 10248.2149177308. The cubic root of 105025909 is about 471.8081982479.

The spelling of 105025909 in words is "one hundred five million, twenty-five thousand, nine hundred nine".