1320349987 has 8 divisors (see below), whose sum is σ = 1444147200. Its totient is φ = 1197180360.

The previous prime is 1320349963. The next prime is 1320349997. The reversal of 1320349987 is 7899430231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1320349987 - 2⁷ = 1320349859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1320349997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152487 + ... + 160912.

It is an arithmetic number, because the mean of its divisors is an integer number (180518400).

Almost surely, 2^1320349987 is an apocalyptic number.

1320349987 is a deficient number, since it is larger than the sum of its proper divisors (123797213).

1320349987 is a wasteful number, since it uses less digits than its factorization.

1320349987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313793.

The product of its (nonzero) digits is 326592, while the sum is 46.

The square root of 1320349987 is about 36336.6204675118. The cubic root of 1320349987 is about 1097.0582519693.

It can be divided in two parts, 13203 and 49987, that added together give a triangular number (63190 = T₃₅₅).

The spelling of 1320349987 in words is "one billion, three hundred twenty million, three hundred forty-nine thousand, nine hundred eighty-seven".