947945646 has 16 divisors (see below), whose sum is σ = 2106546000. Its totient is φ = 315981864.

The previous prime is 947945633. The next prime is 947945659. The reversal of 947945646 is 646549749.

It is a happy number.

947945646 is a `hidden beast` number, since 9 + 4 + 79 + 4 + 564 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (947945633) and next prime (947945659).

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 17554549 = 947945646 / (9 + 4 + 7 + 9 + 4 + 5 + 6 + 4 + 6).

It is a junction number, because it is equal to n+sod(n) for n = 947945592 and 947945601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8777221 + ... + 8777328.

It is an arithmetic number, because the mean of its divisors is an integer number (131659125).

Almost surely, 2^947945646 is an apocalyptic number.

947945646 is an abundant number, since it is smaller than the sum of its proper divisors (1158600354).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

947945646 is a wasteful number, since it uses less digits than its factorization.

947945646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17554560 (or 17554554 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 54.

The square root of 947945646 is about 30788.7259561028. The cubic root of 947945646 is about 982.3384548803.

The spelling of 947945646 in words is "nine hundred forty-seven million, nine hundred forty-five thousand, six hundred forty-six".