1987882865929 has 27 divisors (see below), whose sum is σ = 2115925375053. Its totient is φ = 1867426094424.

The previous prime is 1987882865879. The next prime is 1987882865953. The reversal of 1987882865929 is 9295682887891.

The square root of 1987882865929 is 1409923.

It is a perfect power (a square), and thus also a powerful number.

It is a de Polignac number, because none of the positive numbers 2^k-1987882865929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1987882862929) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1913264992 + ... + 1913266030.

Almost surely, 2^{1987882865929} is an apocalyptic number.

1987882865929 is the 1409923-rd square number.

1987882865929 is the 704962-nd centered octagonal number.

It is an amenable number.

1987882865929 is a deficient number, since it is larger than the sum of its proper divisors (128042509124).

1987882865929 is an frugal number, since it uses more digits than its factorization.

1987882865929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2242 (or 1121 counting only the distinct ones).

The product of its digits is 2508226560, while the sum is 82.

The spelling of 1987882865929 in words is "one trillion, nine hundred eighty-seven billion, eight hundred eighty-two million, eight hundred sixty-five thousand, nine hundred twenty-nine".