2239987 has 2 divisors, whose sum is σ = 2239988. Its totient is φ = 2239986.

The previous prime is 2239961. The next prime is 2239997. The reversal of 2239987 is 7899322.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2239987 is a prime.

It is not a weakly prime, because it can be changed into another prime (2239957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1119993 + 1119994.

It is an arithmetic number, because the mean of its divisors is an integer number (1119994).

2^2239987 is an apocalyptic number.

2239987 is a deficient number, since it is larger than the sum of its proper divisors (1).

2239987 is an equidigital number, since it uses as much as digits as its factorization.

2239987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 40.

The square root of 2239987 is about 1496.6586117081. The cubic root of 2239987 is about 130.8423992888.

It can be divided in two parts, 2 and 239987, that multiplied together give a palindrome (479974).

The spelling of 2239987 in words is "two million, two hundred thirty-nine thousand, nine hundred eighty-seven".