8627643997 has 4 divisors (see below), whose sum is σ = 9860164576. Its totient is φ = 7395123420.

The previous prime is 8627643991. The next prime is 8627644019. The reversal of 8627643997 is 7993467268.

8627643997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is a cyclic number.

It is not a de Polignac number, because 8627643997 - 2³ = 8627643989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8627643991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 616260279 + ... + 616260292.

It is an arithmetic number, because the mean of its divisors is an integer number (2465041144).

Almost surely, 2^8627643997 is an apocalyptic number.

It is an amenable number.

8627643997 is a deficient number, since it is larger than the sum of its proper divisors (1232520579).

8627643997 is a wasteful number, since it uses less digits than its factorization.

8627643997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1232520578.

The product of its digits is 27433728, while the sum is 61.

The square root of 8627643997 is about 92885.1118156188. Note that the first 3 decimals coincide. The cubic root of 8627643997 is about 2050.9924995385.

It can be divided in two parts, 862764 and 3997, that added together give a square (866761 = 931²).

The spelling of 8627643997 in words is "eight billion, six hundred twenty-seven million, six hundred forty-three thousand, nine hundred ninety-seven".