4063781 has 2 divisors, whose sum is σ = 4063782. Its totient is φ = 4063780.

The previous prime is 4063757. The next prime is 4063793. The reversal of 4063781 is 1873604.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2775556 + 1288225 = 1666^2 + 1135^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4063781 is a prime.

It is a super-2 number, since 2×4063781² = 33028632031922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4063711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2031890 + 2031891.

It is an arithmetic number, because the mean of its divisors is an integer number (2031891).

Almost surely, 2^4063781 is an apocalyptic number.

It is an amenable number.

4063781 is a deficient number, since it is larger than the sum of its proper divisors (1).

4063781 is an equidigital number, since it uses as much as digits as its factorization.

4063781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 4063781 is about 2015.8821890180. The cubic root of 4063781 is about 159.5793769665.

The spelling of 4063781 in words is "four million, sixty-three thousand, seven hundred eighty-one".