9749173657 has 4 divisors (see below), whose sum is σ = 10262288080. Its totient is φ = 9236059236.

The previous prime is 9749173607. The next prime is 9749173717. The reversal of 9749173657 is 7563719479.

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 an emirpimes, since its reverse is a distinct semiprime: 7563719479 = 43 ⋅175900453.

It is a cyclic number.

It is not a de Polignac number, because 9749173657 - 2⁷ = 9749173529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9749173607) 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, 256557183 + ... + 256557220.

It is an arithmetic number, because the mean of its divisors is an integer number (2565572020).

Almost surely, 2^9749173657 is an apocalyptic number.

It is an amenable number.

9749173657 is a deficient number, since it is larger than the sum of its proper divisors (513114423).

9749173657 is a wasteful number, since it uses less digits than its factorization.

9749173657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513114422.

The product of its digits is 10001880, while the sum is 58.

The square root of 9749173657 is about 98737.9038515605. The cubic root of 9749173657 is about 2136.2689856123.

The spelling of 9749173657 in words is "nine billion, seven hundred forty-nine million, one hundred seventy-three thousand, six hundred fifty-seven".