947149839 has 6 divisors (see below), whose sum is σ = 1368105336. Its totient is φ = 631433220.

The previous prime is 947149811. The next prime is 947149859. The reversal of 947149839 is 938941749.

947149839 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 947149839 - 2¹¹ = 947147791 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (947149859) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 52619427 + ... + 52619444.

It is an arithmetic number, because the mean of its divisors is an integer number (228017556).

Almost surely, 2^947149839 is an apocalyptic number.

947149839 is a deficient number, since it is larger than the sum of its proper divisors (420955497).

947149839 is a wasteful number, since it uses less digits than its factorization.

947149839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105238877 (or 105238874 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 54.

The square root of 947149839 is about 30775.7995671924. The cubic root of 947149839 is about 982.0634845849.

The spelling of 947149839 in words is "nine hundred forty-seven million, one hundred forty-nine thousand, eight hundred thirty-nine".