8994891931 has 2 divisors, whose sum is σ = 8994891932. Its totient is φ = 8994891930.

The previous prime is 8994891929. The next prime is 8994891943. The reversal of 8994891931 is 1391984998.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8994891931 - 2¹ = 8994891929 is a prime.

It is a super-2 number, since 2×8994891931² (a number of 21 digits) contains 22 as substring.

Together with 8994891929, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 8994891931.

It is not a weakly prime, because it can be changed into another prime (8994898931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4497445965 + 4497445966.

It is an arithmetic number, because the mean of its divisors is an integer number (4497445966).

Almost surely, 2^8994891931 is an apocalyptic number.

8994891931 is a deficient number, since it is larger than the sum of its proper divisors (1).

8994891931 is an equidigital number, since it uses as much as digits as its factorization.

8994891931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5038848, while the sum is 61.

The square root of 8994891931 is about 94841.4040965232. The cubic root of 8994891931 is about 2079.6902222190.

The spelling of 8994891931 in words is "eight billion, nine hundred ninety-four million, eight hundred ninety-one thousand, nine hundred thirty-one".