46509581 has 2 divisors, whose sum is σ = 46509582. Its totient is φ = 46509580.

The previous prime is 46509577. The next prime is 46509601. The reversal of 46509581 is 18590564.

46509581 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42784681 + 3724900 = 6541^2 + 1930^2 .

It is a cyclic number.

It is not a de Polignac number, because 46509581 - 2² = 46509577 is a prime.

It is a super-2 number, since 2×46509581² = 4326282249591122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (46509521) 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 as a sum of consecutive naturals, namely, 23254790 + 23254791.

It is an arithmetic number, because the mean of its divisors is an integer number (23254791).

Almost surely, 2^46509581 is an apocalyptic number.

It is an amenable number.

46509581 is a deficient number, since it is larger than the sum of its proper divisors (1).

46509581 is an equidigital number, since it uses as much as digits as its factorization.

46509581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43200, while the sum is 38.

The square root of 46509581 is about 6819.7933253142. The cubic root of 46509581 is about 359.6230132847.

The spelling of 46509581 in words is "forty-six million, five hundred nine thousand, five hundred eighty-one".