987591970 has 32 divisors (see below), whose sum is σ = 1795913856. Its totient is φ = 390998400.

The previous prime is 987591967. The next prime is 987591977. The reversal of 987591970 is 79195789.

It is not an unprimeable number, because it can be changed into a prime (987591977) 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, 681787 + ... + 683233.

It is an arithmetic number, because the mean of its divisors is an integer number (56122308).

Almost surely, 2^987591970 is an apocalyptic number.

987591970 is a deficient number, since it is larger than the sum of its proper divisors (808321886).

987591970 is a wasteful number, since it uses less digits than its factorization.

987591970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2106.

The product of its (nonzero) digits is 1428840, while the sum is 55.

The square root of 987591970 is about 31425.9760389395. The cubic root of 987591970 is about 995.8467645152.

The spelling of 987591970 in words is "nine hundred eighty-seven million, five hundred ninety-one thousand, nine hundred seventy".