1331229987 has 12 divisors (see below), whose sum is σ = 1923527320. Its totient is φ = 887191488.

The previous prime is 1331229941. The next prime is 1331229997. The reversal of 1331229987 is 7899221331.

1331229987 is a `hidden beast` number, since 1 + 331 + 229 + 98 + 7 = 666.

It is not a de Polignac number, because 1331229987 - 2⁷ = 1331229859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1331229917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5964 + ... + 51942.

Almost surely, 2^1331229987 is an apocalyptic number.

1331229987 is a deficient number, since it is larger than the sum of its proper divisors (592297333).

1331229987 is a wasteful number, since it uses less digits than its factorization.

1331229987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49202 (or 49199 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 1331229987 is about 36486.0245436523. The cubic root of 1331229987 is about 1100.0633536514.

The spelling of 1331229987 in words is "one billion, three hundred thirty-one million, two hundred twenty-nine thousand, nine hundred eighty-seven".