1987424633 has 4 divisors (see below), whose sum is σ = 1991098788. Its totient is φ = 1983750480.

The previous prime is 1987424599. The next prime is 1987424671. The reversal of 1987424633 is 3364247891.

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

It can be written as a sum of positive squares in 2 ways, for example, as 980441344 + 1006983289 = 31312^2 + 31733^2 .

It is a cyclic number.

It is not a de Polignac number, because 1987424633 - 2¹² = 1987420537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1987424233) 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 3 ways as a sum of consecutive naturals, for example, 1836266 + ... + 1837347.

It is an arithmetic number, because the mean of its divisors is an integer number (497774697).

Almost surely, 2^1987424633 is an apocalyptic number.

It is an amenable number.

1987424633 is a deficient number, since it is larger than the sum of its proper divisors (3674155).

1987424633 is an equidigital number, since it uses as much as digits as its factorization.

1987424633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3674154.

The product of its digits is 870912, while the sum is 47.

The square root of 1987424633 is about 44580.5409680053. The cubic root of 1987424633 is about 1257.2748343334.

The spelling of 1987424633 in words is "one billion, nine hundred eighty-seven million, four hundred twenty-four thousand, six hundred thirty-three".