103491778 has 24 divisors (see below), whose sum is σ = 173179188. Its totient is φ = 46108608.

The previous prime is 103491769. The next prime is 103491793. The reversal of 103491778 is 877194301.

It can be written as a sum of positive squares in 6 ways, for example, as 18722929 + 84768849 = 4327^2 + 9207^2 .

It is a super-2 number, since 2×103491778² = 21421096227202568, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 103491778.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 19500 + ... + 24232.

Almost surely, 2^103491778 is an apocalyptic number.

103491778 is a deficient number, since it is larger than the sum of its proper divisors (69687410).

103491778 is a wasteful number, since it uses less digits than its factorization.

103491778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4806 (or 4777 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 40.

The square root of 103491778 is about 10173.0908774079. The cubic root of 103491778 is about 469.4996607012.

The spelling of 103491778 in words is "one hundred three million, four hundred ninety-one thousand, seven hundred seventy-eight".