9748639 has 4 divisors (see below), whose sum is σ = 9882256. Its totient is φ = 9615024.

The previous prime is 9748603. The next prime is 9748657. The reversal of 9748639 is 9368479.

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 9748639 - 2⁹ = 9748127 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9748339) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 66699 + ... + 66844.

It is an arithmetic number, because the mean of its divisors is an integer number (2470564).

Almost surely, 2^9748639 is an apocalyptic number.

9748639 is a deficient number, since it is larger than the sum of its proper divisors (133617).

9748639 is a wasteful number, since it uses less digits than its factorization.

9748639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133616.

The product of its digits is 326592, while the sum is 46.

The square root of 9748639 is about 3122.2810571760. The cubic root of 9748639 is about 213.6229933002.

The spelling of 9748639 in words is "nine million, seven hundred forty-eight thousand, six hundred thirty-nine".