1987832755 has 4 divisors (see below), whose sum is σ = 2385399312. Its totient is φ = 1590266200.

The previous prime is 1987832731. The next prime is 1987832761. The reversal of 1987832755 is 5572387891.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1987832755 - 2⁵ = 1987832723 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1987832696 and 1987832705.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 198783271 + ... + 198783280.

It is an arithmetic number, because the mean of its divisors is an integer number (596349828).

Almost surely, 2^1987832755 is an apocalyptic number.

1987832755 is a deficient number, since it is larger than the sum of its proper divisors (397566557).

1987832755 is an equidigital number, since it uses as much as digits as its factorization.

1987832755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397566556.

The product of its digits is 4233600, while the sum is 55.

The square root of 1987832755 is about 44585.1180888870. The cubic root of 1987832755 is about 1257.3608898231.

The spelling of 1987832755 in words is "one billion, nine hundred eighty-seven million, eight hundred thirty-two thousand, seven hundred fifty-five".