4063991 has 2 divisors, whose sum is σ = 4063992. Its totient is φ = 4063990.

The previous prime is 4063963. The next prime is 4064023. The reversal of 4063991 is 1993604.

It is an a-pointer prime, because the next prime (4064023) can be obtained adding 4063991 to its sum of digits (32).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4063991 - 2¹⁰ = 4062967 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4063931) 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, 2031995 + 2031996.

It is an arithmetic number, because the mean of its divisors is an integer number (2031996).

Almost surely, 2^4063991 is an apocalyptic number.

4063991 is a deficient number, since it is larger than the sum of its proper divisors (1).

4063991 is an equidigital number, since it uses as much as digits as its factorization.

4063991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 4063991 is about 2015.9342747223. The cubic root of 4063991 is about 159.5821257278.

The spelling of 4063991 in words is "four million, sixty-three thousand, nine hundred ninety-one".