103989811 has 4 divisors (see below), whose sum is σ = 105694624. Its totient is φ = 102285000.

The previous prime is 103989773. The next prime is 103989827. The reversal of 103989811 is 118989301.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 118989301 = 2767 ⋅43003.

It is a cyclic number.

It is not a de Polignac number, because 103989811 - 2¹⁷ = 103858739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (103989311) 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, 852315 + ... + 852436.

It is an arithmetic number, because the mean of its divisors is an integer number (26423656).

Almost surely, 2^103989811 is an apocalyptic number.

103989811 is a deficient number, since it is larger than the sum of its proper divisors (1704813).

103989811 is an equidigital number, since it uses as much as digits as its factorization.

103989811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1704812.

The product of its (nonzero) digits is 15552, while the sum is 40.

The square root of 103989811 is about 10197.5394581242. The cubic root of 103989811 is about 470.2515795111.

The spelling of 103989811 in words is "one hundred three million, nine hundred eighty-nine thousand, eight hundred eleven".