987913 has 2 divisors, whose sum is σ = 987914. Its totient is φ = 987912.

The previous prime is 987911. The next prime is 987929. The reversal of 987913 is 319789.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 760384 + 227529 = 872^2 + 477^2 .

It is a cyclic number.

It is not a de Polignac number, because 987913 - 2¹ = 987911 is a prime.

Together with 987911, it forms a pair of twin primes.

It is a plaindrome in base 15.

It is not a weakly prime, because it can be changed into another prime (987911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 493956 + 493957.

It is an arithmetic number, because the mean of its divisors is an integer number (493957).

2⁹⁸⁷⁹¹³ is an apocalyptic number.

It is an amenable number.

987913 is a deficient number, since it is larger than the sum of its proper divisors (1).

987913 is an equidigital number, since it uses as much as digits as its factorization.

987913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13608, while the sum is 37.

The square root of 987913 is about 993.9381268469. The cubic root of 987913 is about 99.5954657269.

The spelling of 987913 in words is "nine hundred eighty-seven thousand, nine hundred thirteen".