9475720861 has 4 divisors (see below), whose sum is σ = 9476070912. Its totient is φ = 9475370812.

The previous prime is 9475720853. The next prime is 9475720867. The reversal of 9475720861 is 1680275749.

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: 1680275749 = 281 ⋅5979629.

It is a cyclic number.

It is not a de Polignac number, because 9475720861 - 2³ = 9475720853 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9475720867) 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, 130675 + ... + 189808.

It is an arithmetic number, because the mean of its divisors is an integer number (2369017728).

Almost surely, 2^9475720861 is an apocalyptic number.

It is an amenable number.

9475720861 is a deficient number, since it is larger than the sum of its proper divisors (350051).

9475720861 is a wasteful number, since it uses less digits than its factorization.

9475720861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350050.

The product of its (nonzero) digits is 846720, while the sum is 49.

The square root of 9475720861 is about 97343.3144134717. The cubic root of 9475720861 is about 2116.1060046647.

The spelling of 9475720861 in words is "nine billion, four hundred seventy-five million, seven hundred twenty thousand, eight hundred sixty-one".