103400665 has 4 divisors (see below), whose sum is σ = 124080804. Its totient is φ = 82720528.

The previous prime is 103400621. The next prime is 103400683. The reversal of 103400665 is 566004301.

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

It can be written as a sum of positive squares in 2 ways, for example, as 42981136 + 60419529 = 6556^2 + 7773^2 .

It is a cyclic number.

It is not a de Polignac number, because 103400665 - 2⁹ = 103400153 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 10340062 + ... + 10340071.

It is an arithmetic number, because the mean of its divisors is an integer number (31020201).

Almost surely, 2^103400665 is an apocalyptic number.

It is an amenable number.

103400665 is a deficient number, since it is larger than the sum of its proper divisors (20680139).

103400665 is an equidigital number, since it uses as much as digits as its factorization.

103400665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20680138.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 103400665 is about 10168.6117538236. The cubic root of 103400665 is about 469.3618395036.

Adding to 103400665 its reverse (566004301), we get a palindrome (669404966).

The spelling of 103400665 in words is "one hundred three million, four hundred thousand, six hundred sixty-five".