4032991 has 2 divisors, whose sum is σ = 4032992. Its totient is φ = 4032990.

The previous prime is 4032989. The next prime is 4033009. The reversal of 4032991 is 1992304.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4032991 - 2¹ = 4032989 is a prime.

Together with 4032989, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4032901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2016495 + 2016496.

It is an arithmetic number, because the mean of its divisors is an integer number (2016496).

Almost surely, 2^4032991 is an apocalyptic number.

4032991 is a deficient number, since it is larger than the sum of its proper divisors (1).

4032991 is an equidigital number, since it uses as much as digits as its factorization.

4032991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 4032991 is about 2008.2308134276. The cubic root of 4032991 is about 159.1753270813.

The spelling of 4032991 in words is "four million, thirty-two thousand, nine hundred ninety-one".