947820823 has 8 divisors (see below), whose sum is σ = 1015761888. Its totient is φ = 882107424.

The previous prime is 947820787. The next prime is 947820851. The reversal of 947820823 is 328028749.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 947820823 - 2¹⁷ = 947689751 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 947820823.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (947880823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 556036 + ... + 557737.

It is an arithmetic number, because the mean of its divisors is an integer number (126970236).

Almost surely, 2^947820823 is an apocalyptic number.

947820823 is a deficient number, since it is larger than the sum of its proper divisors (67941065).

947820823 is a wasteful number, since it uses less digits than its factorization.

947820823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1113833.

The product of its (nonzero) digits is 193536, while the sum is 43.

The square root of 947820823 is about 30786.6987999688. The cubic root of 947820823 is about 982.2953357359.

The spelling of 947820823 in words is "nine hundred forty-seven million, eight hundred twenty thousand, eight hundred twenty-three".