105698009 has 6 divisors (see below), whose sum is σ = 106130010. Its totient is φ = 105267440.

The previous prime is 105697997. The next prime is 105698017. The reversal of 105698009 is 900896501.

It can be written as a sum of positive squares in only one way, i.e., 74304400 + 31393609 = 8620^2 + 5603^2 .

It is a de Polignac number, because none of the positive numbers 2^k-105698009 is a prime.

It is a super-2 number, since 2×105698009² = 22344138213128162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105698039) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 185477 + ... + 186045.

It is an arithmetic number, because the mean of its divisors is an integer number (17688335).

Almost surely, 2^105698009 is an apocalyptic number.

It is an amenable number.

105698009 is a deficient number, since it is larger than the sum of its proper divisors (432001).

105698009 is an frugal number, since it uses more digits than its factorization.

105698009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1431 (or 1000 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 38.

The square root of 105698009 is about 10280.9537008976. The cubic root of 105698009 is about 472.8124846156.

The spelling of 105698009 in words is "one hundred five million, six hundred ninety-eight thousand, nine".