9749387905 has 4 divisors (see below), whose sum is σ = 11699265492. Its totient is φ = 7799510320.

The previous prime is 9749387903. The next prime is 9749387929. The reversal of 9749387905 is 5097839479.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6631170624 + 3118217281 = 81432^2 + 55841^2 .

It is not a de Polignac number, because 9749387905 - 2¹ = 9749387903 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9749387903) 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, 974938786 + ... + 974938795.

It is an arithmetic number, because the mean of its divisors is an integer number (2924816373).

Almost surely, 2^9749387905 is an apocalyptic number.

It is an amenable number.

9749387905 is a deficient number, since it is larger than the sum of its proper divisors (1949877587).

9749387905 is a wasteful number, since it uses less digits than its factorization.

9749387905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1949877586.

The product of its (nonzero) digits is 17146080, while the sum is 61.

The square root of 9749387905 is about 98738.9887784962. The cubic root of 9749387905 is about 2136.2846343918.

The spelling of 9749387905 in words is "nine billion, seven hundred forty-nine million, three hundred eighty-seven thousand, nine hundred five".