8749299643 has 4 divisors (see below), whose sum is σ = 9999199600. Its totient is φ = 7499399688.

The previous prime is 8749299631. The next prime is 8749299649. The reversal of 8749299643 is 3469929478.

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 8749299643 - 2²⁵ = 8715745211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8749299649) 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, 624949968 + ... + 624949981.

It is an arithmetic number, because the mean of its divisors is an integer number (2499799900).

Almost surely, 2^8749299643 is an apocalyptic number.

8749299643 is a deficient number, since it is larger than the sum of its proper divisors (1249899957).

8749299643 is a wasteful number, since it uses less digits than its factorization.

8749299643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1249899956.

The product of its digits is 23514624, while the sum is 61.

The square root of 8749299643 is about 93537.6910288040. The cubic root of 8749299643 is about 2060.5876699420.

The spelling of 8749299643 in words is "eight billion, seven hundred forty-nine million, two hundred ninety-nine thousand, six hundred forty-three".