8442913 has 4 divisors (see below), whose sum is σ = 8449840. Its totient is φ = 8435988.

The previous prime is 8442901. The next prime is 8442923. The reversal of 8442913 is 3192448.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8442913 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8442923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1095 + ... + 4252.

It is an arithmetic number, because the mean of its divisors is an integer number (2112460).

Almost surely, 2^8442913 is an apocalyptic number.

It is an amenable number.

8442913 is a deficient number, since it is larger than the sum of its proper divisors (6927).

8442913 is a wasteful number, since it uses less digits than its factorization.

8442913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6926.

The product of its digits is 6912, while the sum is 31.

The square root of 8442913 is about 2905.6691139908. The cubic root of 8442913 is about 203.6248471753.

The spelling of 8442913 in words is "eight million, four hundred forty-two thousand, nine hundred thirteen".