987679013 has 16 divisors (see below), whose sum is σ = 1037934000. Its totient is φ = 938606592.

The previous prime is 987678983. The next prime is 987679019. The reversal of 987679013 is 310976789.

987679013 = 22222² + 22223².

It can be written as a sum of positive squares in 8 ways, for example, as 588289 + 987090724 = 767^2 + 31418^2 .

It is a cyclic number.

It is not a de Polignac number, because 987679013 - 2¹² = 987674917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (987679019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 662573 + ... + 664061.

It is an arithmetic number, because the mean of its divisors is an integer number (64870875).

Almost surely, 2^987679013 is an apocalyptic number.

987679013 is the 22223-rd centered square number.

It is an amenable number.

987679013 is a deficient number, since it is larger than the sum of its proper divisors (50254987).

987679013 is a wasteful number, since it uses less digits than its factorization.

987679013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1864.

The product of its (nonzero) digits is 571536, while the sum is 50.

The square root of 987679013 is about 31427.3608977910. The cubic root of 987679013 is about 995.8760205056.

The spelling of 987679013 in words is "nine hundred eighty-seven million, six hundred seventy-nine thousand, thirteen".