8941918987 has 4 divisors (see below), whose sum is σ = 8943232936. Its totient is φ = 8940605040.

The previous prime is 8941918967. The next prime is 8941919017. The reversal of 8941918987 is 7898191498.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8941918987 is a prime.

It is a super-2 number, since 2×8941918987² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8941918967) 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, 646713 + ... + 660394.

It is an arithmetic number, because the mean of its divisors is an integer number (2235808234).

Almost surely, 2^8941918987 is an apocalyptic number.

8941918987 is a deficient number, since it is larger than the sum of its proper divisors (1313949).

8941918987 is a wasteful number, since it uses less digits than its factorization.

8941918987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1313948.

The product of its digits is 10450944, while the sum is 64.

The square root of 8941918987 is about 94561.7205162850. The cubic root of 8941918987 is about 2075.5995934636.

The spelling of 8941918987 in words is "eight billion, nine hundred forty-one million, nine hundred eighteen thousand, nine hundred eighty-seven".