987739 has 2 divisors, whose sum is σ = 987740. Its totient is φ = 987738.

The previous prime is 987713. The next prime is 987793. The reversal of 987739 is 937789.

Together with next prime (987793) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is an emirp because it is prime and its reverse (937789) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 987739 - 2⁹ = 987227 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 987695 and 987704.

It is not a weakly prime, because it can be changed into another prime (967739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 493869 + 493870.

It is an arithmetic number, because the mean of its divisors is an integer number (493870).

2⁹⁸⁷⁷³⁹ is an apocalyptic number.

987739 is a deficient number, since it is larger than the sum of its proper divisors (1).

987739 is an equidigital number, since it uses as much as digits as its factorization.

987739 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 95256, while the sum is 43.

The square root of 987739 is about 993.8505923930. The cubic root of 987739 is about 99.5896181713.

The spelling of 987739 in words is "nine hundred eighty-seven thousand, seven hundred thirty-nine".