47160781 has 2 divisors, whose sum is σ = 47160782. Its totient is φ = 47160780.

The previous prime is 47160769. The next prime is 47160797. The reversal of 47160781 is 18706174.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46717225 + 443556 = 6835^2 + 666^2 .

It is a cyclic number.

It is not a de Polignac number, because 47160781 - 2⁵ = 47160749 is a prime.

It is a super-2 number, since 2×47160781² = 4448278529059922, which contains 22 as substring.

It is equal to p_2840758 and since 47160781 and 2840758 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47160731) 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 as a sum of consecutive naturals, namely, 23580390 + 23580391.

It is an arithmetic number, because the mean of its divisors is an integer number (23580391).

Almost surely, 2^47160781 is an apocalyptic number.

It is an amenable number.

47160781 is a deficient number, since it is larger than the sum of its proper divisors (1).

47160781 is an equidigital number, since it uses as much as digits as its factorization.

47160781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9408, while the sum is 34.

The square root of 47160781 is about 6867.3707486927. The cubic root of 47160781 is about 361.2936507719.

The spelling of 47160781 in words is "forty-seven million, one hundred sixty thousand, seven hundred eighty-one".