103209985 has 8 divisors (see below), whose sum is σ = 128122920. Its totient is φ = 79720704.

The previous prime is 103209971. The next prime is 103209989. The reversal of 103209985 is 589902301.

It can be written as a sum of positive squares in 4 ways, for example, as 14077504 + 89132481 = 3752^2 + 9441^2 .

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 103209985 - 2⁷ = 103209857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (103209989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 355752 + ... + 356041.

It is an arithmetic number, because the mean of its divisors is an integer number (16015365).

Almost surely, 2^103209985 is an apocalyptic number.

It is an amenable number.

103209985 is a deficient number, since it is larger than the sum of its proper divisors (24912935).

103209985 is an equidigital number, since it uses as much as digits as its factorization.

103209985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 711827.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 103209985 is about 10159.2315162122. The cubic root of 103209985 is about 469.0731470147.

The spelling of 103209985 in words is "one hundred three million, two hundred nine thousand, nine hundred eighty-five".