947412981 has 12 divisors (see below), whose sum is σ = 1397602752. Its totient is φ = 618169896.

The previous prime is 947412943. The next prime is 947413003. The reversal of 947412981 is 189214749.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-947412981 is a prime.

It is a super-2 number, since 2×947412981² = 1795182713134612722, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (947412581) 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 11 ways as a sum of consecutive naturals, for example, 1119451 + ... + 1120296.

It is an arithmetic number, because the mean of its divisors is an integer number (116466896).

Almost surely, 2^947412981 is an apocalyptic number.

It is an amenable number.

947412981 is a deficient number, since it is larger than the sum of its proper divisors (450189771).

947412981 is a wasteful number, since it uses less digits than its factorization.

947412981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2239800 (or 2239797 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 947412981 is about 30780.0744151147. The cubic root of 947412981 is about 982.1544234594.

The spelling of 947412981 in words is "nine hundred forty-seven million, four hundred twelve thousand, nine hundred eighty-one".