8791381749 has 4 divisors (see below), whose sum is σ = 11721842336. Its totient is φ = 5860921164.

The previous prime is 8791381679. The next prime is 8791381771. The reversal of 8791381749 is 9471831978.

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 not a de Polignac number, because 8791381749 - 2¹⁵ = 8791348981 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 (8791381799) 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, 1465230289 + ... + 1465230294.

It is an arithmetic number, because the mean of its divisors is an integer number (2930460584).

Almost surely, 2^8791381749 is an apocalyptic number.

It is an amenable number.

8791381749 is a deficient number, since it is larger than the sum of its proper divisors (2930460587).

8791381749 is a wasteful number, since it uses less digits than its factorization.

8791381749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2930460586.

The product of its digits is 3048192, while the sum is 57.

The square root of 8791381749 is about 93762.3685121062. The cubic root of 8791381749 is about 2063.8860373556.

The spelling of 8791381749 in words is "eight billion, seven hundred ninety-one million, three hundred eighty-one thousand, seven hundred forty-nine".