47295781 has 8 divisors (see below), whose sum is σ = 52690680. Its totient is φ = 42151872.

The previous prime is 47295749. The next prime is 47295791. The reversal of 47295781 is 18759274.

47295781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 919681 + 46376100 = 959^2 + 6810^2 .

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 47295781 - 2⁵ = 47295749 is a prime.

It is a super-2 number, since 2×47295781² = 4473781800799922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47295791) by changing a digit.

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, 62350 + ... + 63103.

It is an arithmetic number, because the mean of its divisors is an integer number (6586335).

Almost surely, 2^47295781 is an apocalyptic number.

It is an amenable number.

47295781 is a deficient number, since it is larger than the sum of its proper divisors (5394899).

47295781 is a wasteful number, since it uses less digits than its factorization.

47295781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125495.

The product of its digits is 141120, while the sum is 43.

The square root of 47295781 is about 6877.1928139321. The cubic root of 47295781 is about 361.6380624898.

The spelling of 47295781 in words is "forty-seven million, two hundred ninety-five thousand, seven hundred eighty-one".