46539781 has 2 divisors, whose sum is σ = 46539782. Its totient is φ = 46539780.

The previous prime is 46539739. The next prime is 46539793. The reversal of 46539781 is 18793564.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41809156 + 4730625 = 6466^2 + 2175^2 .

It is a cyclic number.

It is not a de Polignac number, because 46539781 - 2¹⁷ = 46408709 is a prime.

It is a super-2 number, since 2×46539781² = 4331902431055922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (46539481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23269890 + 23269891.

It is an arithmetic number, because the mean of its divisors is an integer number (23269891).

Almost surely, 2^46539781 is an apocalyptic number.

It is an amenable number.

46539781 is a deficient number, since it is larger than the sum of its proper divisors (1).

46539781 is an equidigital number, since it uses as much as digits as its factorization.

46539781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 43.

The square root of 46539781 is about 6822.0071093484. The cubic root of 46539781 is about 359.7008342763.

The spelling of 46539781 in words is "forty-six million, five hundred thirty-nine thousand, seven hundred eighty-one".