9959791 has 4 divisors (see below), whose sum is σ = 10056592. Its totient is φ = 9862992.

The previous prime is 9959779. The next prime is 9959797. The reversal of 9959791 is 1979599.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1979599 = 17 ⋅116447.

It is a cyclic number.

It is not a de Polignac number, because 9959791 - 2²¹ = 7862639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9959797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48246 + ... + 48451.

It is an arithmetic number, because the mean of its divisors is an integer number (2514148).

Almost surely, 2^9959791 is an apocalyptic number.

9959791 is a deficient number, since it is larger than the sum of its proper divisors (96801).

9959791 is a wasteful number, since it uses less digits than its factorization.

9959791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96800.

The product of its digits is 229635, while the sum is 49.

The square root of 9959791 is about 3155.9136553461. The cubic root of 9959791 is about 215.1543222313.

The spelling of 9959791 in words is "nine million, nine hundred fifty-nine thousand, seven hundred ninety-one".