9731279745 has 48 divisors (see below), whose sum is σ = 18413553600. Its totient is φ = 4714968960.

The previous prime is 9731279731. The next prime is 9731279749. The reversal of 9731279745 is 5479721379.

It is not a de Polignac number, because 9731279745 - 2⁶ = 9731279681 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 9731279691 and 9731279700.

It is not an unprimeable number, because it can be changed into a prime (9731279749) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 820266 + ... + 832044.

It is an arithmetic number, because the mean of its divisors is an integer number (383615700).

Almost surely, 2^9731279745 is an apocalyptic number.

It is an amenable number.

9731279745 is a deficient number, since it is larger than the sum of its proper divisors (8682273855).

9731279745 is a wasteful number, since it uses less digits than its factorization.

9731279745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13470 (or 13467 counting only the distinct ones).

The product of its digits is 3333960, while the sum is 54.

The square root of 9731279745 is about 98647.2490493273. The cubic root of 9731279745 is about 2134.9611954475.

The spelling of 9731279745 in words is "nine billion, seven hundred thirty-one million, two hundred seventy-nine thousand, seven hundred forty-five".