1987296531 has 32 divisors (see below), whose sum is σ = 3026350080. Its totient is φ = 1148215200.

The previous prime is 1987296497. The next prime is 1987296539. The reversal of 1987296531 is 1356927891.

It is not a de Polignac number, because 1987296531 - 2⁹ = 1987296019 is a prime.

It is a super-2 number, since 2×1987296531² = 7898695004249267922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1987296539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 231840 + ... + 240258.

It is an arithmetic number, because the mean of its divisors is an integer number (94573440).

Almost surely, 2^1987296531 is an apocalyptic number.

1987296531 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1987296531 is a deficient number, since it is larger than the sum of its proper divisors (1039053549).

1987296531 is a wasteful number, since it uses less digits than its factorization.

1987296531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8767.

The product of its digits is 816480, while the sum is 51.

The square root of 1987296531 is about 44579.1041969217. The cubic root of 1987296531 is about 1257.2478206664.

It can be divided in two parts, 19872 and 96531, that added together give a triangular number (116403 = T₄₈₂).

The spelling of 1987296531 in words is "one billion, nine hundred eighty-seven million, two hundred ninety-six thousand, five hundred thirty-one".