9772787873 has 4 divisors (see below), whose sum is σ = 9774083220. Its totient is φ = 9771492528.

The previous prime is 9772787831. The next prime is 9772787881. The reversal of 9772787873 is 3787872779.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4226560144 + 5546227729 = 65012^2 + 74473^2 .

It is a cyclic number.

It is not a de Polignac number, because 9772787873 - 2²⁴ = 9756010657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9772787813) 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, 636290 + ... + 651467.

It is an arithmetic number, because the mean of its divisors is an integer number (2443520805).

Almost surely, 2^9772787873 is an apocalyptic number.

It is an amenable number.

9772787873 is a deficient number, since it is larger than the sum of its proper divisors (1295347).

9772787873 is a wasteful number, since it uses less digits than its factorization.

9772787873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1295346.

The product of its digits is 58084992, while the sum is 65.

The square root of 9772787873 is about 98857.4118263269. The cubic root of 9772787873 is about 2137.9924014900.

The spelling of 9772787873 in words is "nine billion, seven hundred seventy-two million, seven hundred eighty-seven thousand, eight hundred seventy-three".