947395257 has 16 divisors (see below), whose sum is σ = 1270339200. Its totient is φ = 628035200.

The previous prime is 947395243. The next prime is 947395259. The reversal of 947395257 is 752593749.

947395257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 947395257 - 2²⁷ = 813177529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (947395259) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 485119 + ... + 487067.

It is an arithmetic number, because the mean of its divisors is an integer number (79396200).

Almost surely, 2^947395257 is an apocalyptic number.

It is an amenable number.

947395257 is a deficient number, since it is larger than the sum of its proper divisors (322943943).

947395257 is a wasteful number, since it uses less digits than its factorization.

947395257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2784.

The product of its digits is 2381400, while the sum is 51.

The square root of 947395257 is about 30779.7865002342. The cubic root of 947395257 is about 982.1482987761.

The spelling of 947395257 in words is "nine hundred forty-seven million, three hundred ninety-five thousand, two hundred fifty-seven".