9949391 has 4 divisors (see below), whose sum is σ = 9972000. Its totient is φ = 9926784.

The previous prime is 9949321. The next prime is 9949393. The reversal of 9949391 is 1939499.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9949391 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9949393) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10631 + ... + 11528.

It is an arithmetic number, because the mean of its divisors is an integer number (2493000).

Almost surely, 2^9949391 is an apocalyptic number.

9949391 is a deficient number, since it is larger than the sum of its proper divisors (22609).

9949391 is a wasteful number, since it uses less digits than its factorization.

9949391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22608.

The product of its digits is 78732, while the sum is 44.

The square root of 9949391 is about 3154.2655246507. The cubic root of 9949391 is about 215.0794082015.

The spelling of 9949391 in words is "nine million, nine hundred forty-nine thousand, three hundred ninety-one".