8608722139 has 4 divisors (see below), whose sum is σ = 8625246120. Its totient is φ = 8592198160.

The previous prime is 8608722121. The next prime is 8608722203. The reversal of 8608722139 is 9312278068.

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

It is a cyclic number.

It is not a de Polignac number, because 8608722139 - 2¹¹ = 8608720091 is a prime.

It is a super-2 number, since 2×8608722139² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8608722119) 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, 8261209 + ... + 8262250.

It is an arithmetic number, because the mean of its divisors is an integer number (2156311530).

Almost surely, 2^8608722139 is an apocalyptic number.

8608722139 is a deficient number, since it is larger than the sum of its proper divisors (16523981).

8608722139 is a wasteful number, since it uses less digits than its factorization.

8608722139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16523980.

The product of its (nonzero) digits is 290304, while the sum is 46.

The square root of 8608722139 is about 92783.1996592055. The cubic root of 8608722139 is about 2049.4920128588.

The spelling of 8608722139 in words is "eight billion, six hundred eight million, seven hundred twenty-two thousand, one hundred thirty-nine".