8707742091 has 48 divisors (see below), whose sum is σ = 13586227200. Its totient is φ = 5354121984.

The previous prime is 8707742083. The next prime is 8707742093. The reversal of 8707742091 is 1902477078.

It is a happy number.

8707742091 is a `hidden beast` number, since 8 + 70 + 77 + 420 + 91 = 666.

It is not a de Polignac number, because 8707742091 - 2³ = 8707742083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8707742093) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3239350 + ... + 3242036.

It is an arithmetic number, because the mean of its divisors is an integer number (283046400).

Almost surely, 2^8707742091 is an apocalyptic number.

8707742091 is a deficient number, since it is larger than the sum of its proper divisors (4878485109).

8707742091 is a wasteful number, since it uses less digits than its factorization.

8707742091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3128 (or 3125 counting only the distinct ones).

The product of its (nonzero) digits is 197568, while the sum is 45.

The square root of 8707742091 is about 93315.2832659260. The cubic root of 8707742091 is about 2057.3200210288.

The spelling of 8707742091 in words is "eight billion, seven hundred seven million, seven hundred forty-two thousand, ninety-one".