106249809 has 8 divisors (see below), whose sum is σ = 141717600. Its totient is φ = 70807616.

The previous prime is 106249807. The next prime is 106249831. The reversal of 106249809 is 908942601.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 106249809 - 2¹ = 106249807 is a prime.

It is a super-2 number, since 2×106249809² = 22578043825072962, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (106249807) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7774 + ... + 16520.

It is an arithmetic number, because the mean of its divisors is an integer number (17714700).

Almost surely, 2^106249809 is an apocalyptic number.

It is an amenable number.

106249809 is a deficient number, since it is larger than the sum of its proper divisors (35467791).

106249809 is an equidigital number, since it uses as much as digits as its factorization.

106249809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12799.

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 106249809 is about 10307.7547991791. The cubic root of 106249809 is about 473.6338347838.

The spelling of 106249809 in words is "one hundred six million, two hundred forty-nine thousand, eight hundred nine".