103665603 has 4 divisors (see below), whose sum is σ = 138220808. Its totient is φ = 69110400.

The previous prime is 103665599. The next prime is 103665607. The reversal of 103665603 is 306566301.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (103665599) and next prime (103665607).

It is not a de Polignac number, because 103665603 - 2² = 103665599 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (103665607) 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, 17277598 + ... + 17277603.

It is an arithmetic number, because the mean of its divisors is an integer number (34555202).

Almost surely, 2^103665603 is an apocalyptic number.

103665603 is a deficient number, since it is larger than the sum of its proper divisors (34555205).

103665603 is an equidigital number, since it uses as much as digits as its factorization.

103665603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34555204.

The product of its (nonzero) digits is 9720, while the sum is 30.

The square root of 103665603 is about 10181.6306650752. The cubic root of 103665603 is about 469.7623712001.

The spelling of 103665603 in words is "one hundred three million, six hundred sixty-five thousand, six hundred three".