4053991 has 2 divisors, whose sum is σ = 4053992. Its totient is φ = 4053990.

The previous prime is 4053989. The next prime is 4054009. The reversal of 4053991 is 1993504.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4053991 - 2¹ = 4053989 is a prime.

Together with 4053989, it forms a pair of twin primes.

4053991 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4053941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2026995 + 2026996.

It is an arithmetic number, because the mean of its divisors is an integer number (2026996).

Almost surely, 2^4053991 is an apocalyptic number.

4053991 is a deficient number, since it is larger than the sum of its proper divisors (1).

4053991 is an equidigital number, since it uses as much as digits as its factorization.

4053991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 4053991 is about 2013.4525075104. The cubic root of 4053991 is about 159.4511270813.

The spelling of 4053991 in words is "four million, fifty-three thousand, nine hundred ninety-one".