8623641749 has 4 divisors (see below), whose sum is σ = 8624154240. Its totient is φ = 8623129260.

The previous prime is 8623641727. The next prime is 8623641821. The reversal of 8623641749 is 9471463268.

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 a de Polignac number, because none of the positive numbers 2^k-8623641749 is a prime.

It is a super-3 number, since 3×8623641749³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8623641697 and 8623641706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8623641449) 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, 230117 + ... + 264954.

It is an arithmetic number, because the mean of its divisors is an integer number (2156038560).

Almost surely, 2^8623641749 is an apocalyptic number.

It is an amenable number.

8623641749 is a deficient number, since it is larger than the sum of its proper divisors (512491).

8623641749 is a wasteful number, since it uses less digits than its factorization.

8623641749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512490.

The product of its digits is 1741824, while the sum is 50.

The square root of 8623641749 is about 92863.5652395491. The cubic root of 8623641749 is about 2050.6753078756.

The spelling of 8623641749 in words is "eight billion, six hundred twenty-three million, six hundred forty-one thousand, seven hundred forty-nine".