8991375277 has 4 divisors (see below), whose sum is σ = 9125574976. Its totient is φ = 8857175580.

The previous prime is 8991375223. The next prime is 8991375307. The reversal of 8991375277 is 7725731998.

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-8991375277 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 (8991375077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67099749 + ... + 67099882.

It is an arithmetic number, because the mean of its divisors is an integer number (2281393744).

Almost surely, 2^8991375277 is an apocalyptic number.

It is an amenable number.

8991375277 is a deficient number, since it is larger than the sum of its proper divisors (134199699).

8991375277 is a wasteful number, since it uses less digits than its factorization.

8991375277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134199698.

The product of its digits is 6667920, while the sum is 58.

The square root of 8991375277 is about 94822.8626281658. The cubic root of 8991375277 is about 2079.4191608097.

The spelling of 8991375277 in words is "eight billion, nine hundred ninety-one million, three hundred seventy-five thousand, two hundred seventy-seven".