9746921609 has 4 divisors (see below), whose sum is σ = 9749201616. Its totient is φ = 9744641604.

The previous prime is 9746921603. The next prime is 9746921629. The reversal of 9746921609 is 9061296479.

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: 9061296479 = 19 ⋅476910341.

It is a cyclic number.

It is not a de Polignac number, because 9746921609 - 2²⁴ = 9730144393 is a prime.

It is a super-2 number, since 2×9746921609² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9746921603) 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, 1133579 + ... + 1142144.

It is an arithmetic number, because the mean of its divisors is an integer number (2437300404).

Almost surely, 2^9746921609 is an apocalyptic number.

It is an amenable number.

9746921609 is a deficient number, since it is larger than the sum of its proper divisors (2280007).

9746921609 is a wasteful number, since it uses less digits than its factorization.

9746921609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2280006.

The product of its (nonzero) digits is 1469664, while the sum is 53.

The square root of 9746921609 is about 98726.4990212861. The cubic root of 9746921609 is about 2136.1044810448.

The spelling of 9746921609 in words is "nine billion, seven hundred forty-six million, nine hundred twenty-one thousand, six hundred nine".