103856809 has 4 divisors (see below), whose sum is σ = 118693504. Its totient is φ = 89020116.

The previous prime is 103856807. The next prime is 103856861. The reversal of 103856809 is 908658301.

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 a cyclic number.

It is not a de Polignac number, because 103856809 - 2¹ = 103856807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (103856807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7418337 + ... + 7418350.

It is an arithmetic number, because the mean of its divisors is an integer number (29673376).

Almost surely, 2^103856809 is an apocalyptic number.

It is an amenable number.

103856809 is a deficient number, since it is larger than the sum of its proper divisors (14836695).

103856809 is an equidigital number, since it uses as much as digits as its factorization.

103856809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14836694.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 103856809 is about 10191.0160926180. The cubic root of 103856809 is about 470.0510115147.

The spelling of 103856809 in words is "one hundred three million, eight hundred fifty-six thousand, eight hundred nine".