9772091817 has 8 divisors (see below), whose sum is σ = 13030021824. Its totient is φ = 6514444848.

The previous prime is 9772091789. The next prime is 9772091821. The reversal of 9772091817 is 7181902779.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9772091817 - 2¹⁰ = 9772090793 is a prime.

It is a super-2 number, since 2×9772091817² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 9772091817.

It is not an unprimeable number, because it can be changed into a prime (9772091897) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30508 + ... + 143090.

It is an arithmetic number, because the mean of its divisors is an integer number (1628752728).

Almost surely, 2^9772091817 is an apocalyptic number.

It is an amenable number.

9772091817 is a deficient number, since it is larger than the sum of its proper divisors (3257930007).

9772091817 is a wasteful number, since it uses less digits than its factorization.

9772091817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141519.

The product of its (nonzero) digits is 444528, while the sum is 51.

The square root of 9772091817 is about 98853.8912587663. The cubic root of 9772091817 is about 2137.9416415707.

The spelling of 9772091817 in words is "nine billion, seven hundred seventy-two million, ninety-one thousand, eight hundred seventeen".