47136805 has 8 divisors (see below), whose sum is σ = 56654712. Its totient is φ = 37649088.

The previous prime is 47136799. The next prime is 47136809. The reversal of 47136805 is 50863174.

It can be written as a sum of positive squares in 4 ways, for example, as 1520289 + 45616516 = 1233^2 + 6754^2 .

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 47136805 - 2³ = 47136797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47136809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3954 + ... + 10483.

It is an arithmetic number, because the mean of its divisors is an integer number (7081839).

Almost surely, 2^47136805 is an apocalyptic number.

It is an amenable number.

47136805 is a deficient number, since it is larger than the sum of its proper divisors (9517907).

47136805 is a wasteful number, since it uses less digits than its factorization.

47136805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15095.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 47136805 is about 6865.6248805189. The cubic root of 47136805 is about 361.2324145445.

Adding to 47136805 its reverse (50863174), we get a palindrome (97999979).

The spelling of 47136805 in words is "forty-seven million, one hundred thirty-six thousand, eight hundred five".