4031987 has 2 divisors, whose sum is σ = 4031988. Its totient is φ = 4031986.

The previous prime is 4031977. The next prime is 4032029. The reversal of 4031987 is 7891304.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4031987 - 2¹⁰ = 4030963 is a prime.

It is not a weakly prime, because it can be changed into another prime (4031947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2015993 + 2015994.

It is an arithmetic number, because the mean of its divisors is an integer number (2015994).

Almost surely, 2^4031987 is an apocalyptic number.

4031987 is a deficient number, since it is larger than the sum of its proper divisors (1).

4031987 is an equidigital number, since it uses as much as digits as its factorization.

4031987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 4031987 is about 2007.9808266017. The cubic root of 4031987 is about 159.1621172583.

The spelling of 4031987 in words is "four million, thirty-one thousand, nine hundred eighty-seven".