987278013 has 12 divisors (see below), whose sum is σ = 1488071520. Its totient is φ = 629568456.

The previous prime is 987277999. The next prime is 987278021. The reversal of 987278013 is 310872789.

It is not a de Polignac number, because 987278013 - 2¹³ = 987269821 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 987278013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (987278053) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2384523 + ... + 2384936.

It is an arithmetic number, because the mean of its divisors is an integer number (124005960).

Almost surely, 2^987278013 is an apocalyptic number.

It is an amenable number.

987278013 is a deficient number, since it is larger than the sum of its proper divisors (500793507).

987278013 is a wasteful number, since it uses less digits than its factorization.

987278013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4769488 (or 4769485 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 45.

The square root of 987278013 is about 31420.9804589227. The cubic root of 987278013 is about 995.7412262602.

The spelling of 987278013 in words is "nine hundred eighty-seven million, two hundred seventy-eight thousand, thirteen".