1987184231 has 2 divisors, whose sum is σ = 1987184232. Its totient is φ = 1987184230.

The previous prime is 1987184219. The next prime is 1987184233. The reversal of 1987184231 is 1324817891.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1987184231 - 2¹⁰ = 1987183207 is a prime.

It is a super-2 number, since 2×1987184231² = 7897802335870122722, which contains 22 as substring.

Together with 1987184233, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1987184233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 993592115 + 993592116.

It is an arithmetic number, because the mean of its divisors is an integer number (993592116).

Almost surely, 2^1987184231 is an apocalyptic number.

1987184231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1987184231 is an equidigital number, since it uses as much as digits as its factorization.

1987184231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96768, while the sum is 44.

The square root of 1987184231 is about 44577.8446203941. The cubic root of 1987184231 is about 1257.2241383108.

The spelling of 1987184231 in words is "one billion, nine hundred eighty-seven million, one hundred eighty-four thousand, two hundred thirty-one".