8978722345 has 4 divisors (see below), whose sum is σ = 10774466820. Its totient is φ = 7182977872.

The previous prime is 8978722343. The next prime is 8978722349. The reversal of 8978722345 is 5432278798.

It is a happy number.

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 1693075609 + 7285646736 = 41147^2 + 85356^2 .

It is a cyclic number.

It is not a de Polignac number, because 8978722345 - 2¹ = 8978722343 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8978722343) 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, 897872230 + ... + 897872239.

It is an arithmetic number, because the mean of its divisors is an integer number (2693616705).

Almost surely, 2^8978722345 is an apocalyptic number.

It is an amenable number.

8978722345 is a deficient number, since it is larger than the sum of its proper divisors (1795744475).

8978722345 is a wasteful number, since it uses less digits than its factorization.

8978722345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1795744474.

The product of its digits is 6773760, while the sum is 55.

The square root of 8978722345 is about 94756.1203564181. The cubic root of 8978722345 is about 2078.4432959820.

The spelling of 8978722345 in words is "eight billion, nine hundred seventy-eight million, seven hundred twenty-two thousand, three hundred forty-five".