9991396 has 6 divisors (see below), whose sum is σ = 17484950. Its totient is φ = 4995696.

The previous prime is 9991379. The next prime is 9991409. The reversal of 9991396 is 6931999.

It can be written as a sum of positive squares in only one way, i.e., 5428900 + 4562496 = 2330^2 + 2136^2 .

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 as a sum of consecutive naturals, namely, 1248921 + ... + 1248928.

Almost surely, 2^9991396 is an apocalyptic number.

It is an amenable number.

9991396 is a deficient number, since it is larger than the sum of its proper divisors (7493554).

9991396 is a wasteful number, since it uses less digits than its factorization.

9991396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2497853 (or 2497851 counting only the distinct ones).

The product of its digits is 118098, while the sum is 46.

The square root of 9991396 is about 3160.9169555684. The cubic root of 9991396 is about 215.3816620867.

The spelling of 9991396 in words is "nine million, nine hundred ninety-one thousand, three hundred ninety-six".