103689505 has 4 divisors (see below), whose sum is σ = 124427412. Its totient is φ = 82951600.

The previous prime is 103689463. The next prime is 103689541. The reversal of 103689505 is 505986301.

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 20223009 + 83466496 = 4497^2 + 9136^2 .

It is not a de Polignac number, because 103689505 - 2⁹ = 103688993 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10368946 + ... + 10368955.

It is an arithmetic number, because the mean of its divisors is an integer number (31106853).

Almost surely, 2^103689505 is an apocalyptic number.

It is an amenable number.

103689505 is a deficient number, since it is larger than the sum of its proper divisors (20737907).

103689505 is an equidigital number, since it uses as much as digits as its factorization.

103689505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20737906.

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 103689505 is about 10182.8043779698. The cubic root of 103689505 is about 469.7984725266.

The spelling of 103689505 in words is "one hundred three million, six hundred eighty-nine thousand, five hundred five".