947993994 has 12 divisors (see below), whose sum is σ = 2053987026. Its totient is φ = 315997992.

The previous prime is 947993971. The next prime is 947994007. The reversal of 947993994 is 499399749.

It can be written as a sum of positive squares in only one way, i.e., 616280625 + 331713369 = 24825^2 + 18213^2 .

It is a super-2 number, since 2×947993994² = 1797385225320144072, which contains 22 as substring.

It is an unprimeable number.

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 in 5 ways as a sum of consecutive naturals, for example, 26333149 + ... + 26333184.

Almost surely, 2^947993994 is an apocalyptic number.

947993994 is an abundant number, since it is smaller than the sum of its proper divisors (1105993032).

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

947993994 is a wasteful number, since it uses less digits than its factorization.

947993994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52666341 (or 52666338 counting only the distinct ones).

The product of its digits is 19840464, while the sum is 63.

The square root of 947993994 is about 30789.5111036210. The cubic root of 947993994 is about 982.3551553076.

The spelling of 947993994 in words is "nine hundred forty-seven million, nine hundred ninety-three thousand, nine hundred ninety-four".