2987839 has 2 divisors, whose sum is σ = 2987840. Its totient is φ = 2987838.

The previous prime is 2987827. The next prime is 2987843. The reversal of 2987839 is 9387892.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2987839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2987849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1493919 + 1493920.

It is an arithmetic number, because the mean of its divisors is an integer number (1493920).

2^2987839 is an apocalyptic number.

2987839 is a deficient number, since it is larger than the sum of its proper divisors (1).

2987839 is an equidigital number, since it uses as much as digits as its factorization.

2987839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 46.

The square root of 2987839 is about 1728.5366643494. The cubic root of 2987839 is about 144.0298131430.

The spelling of 2987839 in words is "two million, nine hundred eighty-seven thousand, eight hundred thirty-nine".