947868891 has 8 divisors (see below), whose sum is σ = 1264645200. Its totient is φ = 631502592.

The previous prime is 947868871. The next prime is 947868913. The reversal of 947868891 is 198868749.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 947868891 - 2⁹ = 947868379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (947868871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97066 + ... + 106383.

It is an arithmetic number, because the mean of its divisors is an integer number (158080650).

Almost surely, 2^947868891 is an apocalyptic number.

947868891 is a deficient number, since it is larger than the sum of its proper divisors (316776309).

947868891 is a wasteful number, since it uses less digits than its factorization.

947868891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205005.

The product of its digits is 6967296, while the sum is 60.

The square root of 947868891 is about 30787.4794518811. The cubic root of 947868891 is about 982.3119409047.

The spelling of 947868891 in words is "nine hundred forty-seven million, eight hundred sixty-eight thousand, eight hundred ninety-one".