947928939 has 4 divisors (see below), whose sum is σ = 1263905256. Its totient is φ = 631952624.

The previous prime is 947928899. The next prime is 947928941. The reversal of 947928939 is 939829749.

947928939 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 947928939 - 2¹³ = 947920747 is a prime.

It is not an unprimeable number, because it can be changed into a prime (947928439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157988154 + ... + 157988159.

It is an arithmetic number, because the mean of its divisors is an integer number (315976314).

Almost surely, 2^947928939 is an apocalyptic number.

947928939 is a deficient number, since it is larger than the sum of its proper divisors (315976317).

947928939 is a wasteful number, since it uses less digits than its factorization.

947928939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315976316.

The product of its digits is 8817984, while the sum is 60.

The square root of 947928939 is about 30788.4546380620. The cubic root of 947928939 is about 982.3326837952.

The spelling of 947928939 in words is "nine hundred forty-seven million, nine hundred twenty-eight thousand, nine hundred thirty-nine".