8791489387 has 4 divisors (see below), whose sum is σ = 9173728080. Its totient is φ = 8409250696.

The previous prime is 8791489381. The next prime is 8791489409. The reversal of 8791489387 is 7839841978.

It is a happy number.

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 8791489387 - 2¹¹ = 8791487339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8791489381) 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, 191119312 + ... + 191119357.

It is an arithmetic number, because the mean of its divisors is an integer number (2293432020).

Almost surely, 2^8791489387 is an apocalyptic number.

8791489387 is a deficient number, since it is larger than the sum of its proper divisors (382238693).

8791489387 is a wasteful number, since it uses less digits than its factorization.

8791489387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382238692.

The product of its digits is 24385536, while the sum is 64.

The square root of 8791489387 is about 93762.9425039552. The cubic root of 8791489387 is about 2063.8944604402.

The spelling of 8791489387 in words is "eight billion, seven hundred ninety-one million, four hundred eighty-nine thousand, three hundred eighty-seven".