4663781 has 2 divisors, whose sum is σ = 4663782. Its totient is φ = 4663780.

The previous prime is 4663741. The next prime is 4663787. The reversal of 4663781 is 1873664.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4661281 + 2500 = 2159^2 + 50^2 .

It is a cyclic number.

It is not a de Polignac number, because 4663781 - 2⁶ = 4663717 is a prime.

It is a super-2 number, since 2×4663781² = 43501706431922, 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 (4663787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2331890 + 2331891.

It is an arithmetic number, because the mean of its divisors is an integer number (2331891).

Almost surely, 2^4663781 is an apocalyptic number.

It is an amenable number.

4663781 is a deficient number, since it is larger than the sum of its proper divisors (1).

4663781 is an equidigital number, since it uses as much as digits as its factorization.

4663781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 35.

The square root of 4663781 is about 2159.5788941365. The cubic root of 4663781 is about 167.0754795235.

The spelling of 4663781 in words is "four million, six hundred sixty-three thousand, seven hundred eighty-one".