8634721247 has 8 divisors (see below), whose sum is σ = 9118412160. Its totient is φ = 8153953560.

The previous prime is 8634721223. The next prime is 8634721259. The reversal of 8634721247 is 7421274368.

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

It is a cyclic number.

It is not a de Polignac number, because 8634721247 - 2³⁰ = 7560979423 is a prime.

It is a super-2 number, since 2×8634721247² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8634721198 and 8634721207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8634721267) 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, 724733 + ... + 736550.

It is an arithmetic number, because the mean of its divisors is an integer number (1139801520).

Almost surely, 2^8634721247 is an apocalyptic number.

8634721247 is a deficient number, since it is larger than the sum of its proper divisors (483690913).

8634721247 is a wasteful number, since it uses less digits than its factorization.

8634721247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1461613.

The product of its digits is 451584, while the sum is 44.

The square root of 8634721247 is about 92923.2008004460. The cubic root of 8634721247 is about 2051.5531554755.

The spelling of 8634721247 in words is "eight billion, six hundred thirty-four million, seven hundred twenty-one thousand, two hundred forty-seven".