122947805 has 8 divisors (see below), whose sum is σ = 148998744. Its totient is φ = 97384000.

The previous prime is 122947777. The next prime is 122947819. The reversal of 122947805 is 508749221.

It can be written as a sum of positive squares in 4 ways, for example, as 61136761 + 61811044 = 7819^2 + 7862^2 .

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

It is not a de Polignac number, because 122947805 - 2²⁰ = 121899229 is a prime.

It is a Duffinian number.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 121226 + ... + 122235.

It is an arithmetic number, because the mean of its divisors is an integer number (18624843).

Almost surely, 2^122947805 is an apocalyptic number.

It is an amenable number.

122947805 is a deficient number, since it is larger than the sum of its proper divisors (26050939).

122947805 is a wasteful number, since it uses less digits than its factorization.

122947805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243567.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 122947805 is about 11088.1831243897. The cubic root of 122947805 is about 497.2486276713.

The spelling of 122947805 in words is "one hundred twenty-two million, nine hundred forty-seven thousand, eight hundred five".