9913691 has 4 divisors (see below), whose sum is σ = 10015992. Its totient is φ = 9811392.

The previous prime is 9913661. The next prime is 9913697. The reversal of 9913691 is 1963199.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 9913691 - 2¹⁸ = 9651547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9913697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51005 + ... + 51198.

It is an arithmetic number, because the mean of its divisors is an integer number (2503998).

Almost surely, 2^9913691 is an apocalyptic number.

9913691 is a deficient number, since it is larger than the sum of its proper divisors (102301).

9913691 is a wasteful number, since it uses less digits than its factorization.

9913691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102300.

The product of its digits is 13122, while the sum is 38.

The square root of 9913691 is about 3148.6014355583. The cubic root of 9913691 is about 214.8218535123.

The spelling of 9913691 in words is "nine million, nine hundred thirteen thousand, six hundred ninety-one".