9505661973 has 16 divisors (see below), whose sum is σ = 13411547136. Its totient is φ = 5976204080.

The previous prime is 9505661959. The next prime is 9505661983. The reversal of 9505661973 is 3791665059.

It is not a de Polignac number, because 9505661973 - 2⁵ = 9505661941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9505661983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 965265 + ... + 975062.

It is an arithmetic number, because the mean of its divisors is an integer number (838221696).

Almost surely, 2^9505661973 is an apocalyptic number.

It is an amenable number.

9505661973 is a deficient number, since it is larger than the sum of its proper divisors (3905885163).

9505661973 is a wasteful number, since it uses less digits than its factorization.

9505661973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1940424.

The product of its (nonzero) digits is 1530900, while the sum is 51.

The square root of 9505661973 is about 97496.9844302889. The cubic root of 9505661973 is about 2118.3324650348.

The spelling of 9505661973 in words is "nine billion, five hundred five million, six hundred sixty-one thousand, nine hundred seventy-three".