9913778 has 12 divisors (see below), whose sum is σ = 17298702. Its totient is φ = 4248720.

The previous prime is 9913753. The next prime is 9913807. The reversal of 9913778 is 8773199.

9913778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 6315169 + 3598609 = 2513^2 + 1897^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 50483 + ... + 50678.

Almost surely, 2^9913778 is an apocalyptic number.

9913778 is a gapful number since it is divisible by the number (98) formed by its first and last digit.

9913778 is a deficient number, since it is larger than the sum of its proper divisors (7384924).

9913778 is a wasteful number, since it uses less digits than its factorization.

9913778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101177 (or 101170 counting only the distinct ones).

The product of its digits is 95256, while the sum is 44.

The square root of 9913778 is about 3148.6152511858. The cubic root of 9913778 is about 214.8224819176.

The spelling of 9913778 in words is "nine million, nine hundred thirteen thousand, seven hundred seventy-eight".