987792005 has 16 divisors (see below), whose sum is σ = 1211675760. Its totient is φ = 772781568.

The previous prime is 987791999. The next prime is 987792011. The reversal of 987792005 is 500297789.

It is an interprime number because it is at equal distance from previous prime (987791999) and next prime (987792011).

It can be written as a sum of positive squares in 8 ways, for example, as 144528484 + 843263521 = 12022^2 + 29039^2 .

It is a cyclic number.

It is not a de Polignac number, because 987792005 - 2¹² = 987787909 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76991 + ... + 88899.

It is an arithmetic number, because the mean of its divisors is an integer number (75729735).

Almost surely, 2^987792005 is an apocalyptic number.

It is an amenable number.

987792005 is a deficient number, since it is larger than the sum of its proper divisors (223883755).

987792005 is a wasteful number, since it uses less digits than its factorization.

987792005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12280.

The product of its (nonzero) digits is 317520, while the sum is 47.

The square root of 987792005 is about 31429.1585156205. The cubic root of 987792005 is about 995.9139956409.

The spelling of 987792005 in words is "nine hundred eighty-seven million, seven hundred ninety-two thousand, five".