2147987 has 2 divisors, whose sum is σ = 2147988. Its totient is φ = 2147986.

The previous prime is 2147941. The next prime is 2147989. The reversal of 2147987 is 7897412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2147987 - 2⁶ = 2147923 is a prime.

It is a super-2 number, since 2×2147987² = 9227696304338, which contains 22 as substring.

Together with 2147989, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2147987.

It is not a weakly prime, because it can be changed into another prime (2147989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1073993 + 1073994.

It is an arithmetic number, because the mean of its divisors is an integer number (1073994).

2^2147987 is an apocalyptic number.

2147987 is a deficient number, since it is larger than the sum of its proper divisors (1).

2147987 is an equidigital number, since it uses as much as digits as its factorization.

2147987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28224, while the sum is 38.

The square root of 2147987 is about 1465.6012418117. The cubic root of 2147987 is about 129.0259948015.

The spelling of 2147987 in words is "two million, one hundred forty-seven thousand, nine hundred eighty-seven".