9648867391 has 4 divisors (see below), whose sum is σ = 9734255712. Its totient is φ = 9563479072.

The previous prime is 9648867343. The next prime is 9648867421. The reversal of 9648867391 is 1937688469.

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-9648867391 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 (9648867341) 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, 42693991 + ... + 42694216.

It is an arithmetic number, because the mean of its divisors is an integer number (2433563928).

Almost surely, 2^9648867391 is an apocalyptic number.

9648867391 is a deficient number, since it is larger than the sum of its proper divisors (85388321).

9648867391 is a wasteful number, since it uses less digits than its factorization.

9648867391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85388320.

The product of its digits is 15676416, while the sum is 61.

The square root of 9648867391 is about 98228.6485247558. The cubic root of 9648867391 is about 2128.9172416447.

The spelling of 9648867391 in words is "nine billion, six hundred forty-eight million, eight hundred sixty-seven thousand, three hundred ninety-one".