1345984887 has 16 divisors (see below), whose sum is σ = 1933813728. Its totient is φ = 827819520.

The previous prime is 1345984837. The next prime is 1345984897. The reversal of 1345984887 is 7884895431.

It is not a de Polignac number, because 1345984887 - 2²⁰ = 1344936311 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1345984837) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65587 + ... + 83627.

It is an arithmetic number, because the mean of its divisors is an integer number (120863358).

Almost surely, 2^1345984887 is an apocalyptic number.

1345984887 is a deficient number, since it is larger than the sum of its proper divisors (587828841).

1345984887 is a wasteful number, since it uses less digits than its factorization.

1345984887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19970.

The product of its digits is 7741440, while the sum is 57.

The square root of 1345984887 is about 36687.6666878666. Note that the first 4 decimals coincide. The cubic root of 1345984887 is about 1104.1126724495.

It can be divided in two parts, 13459 and 84887, that added together give a triangular number (98346 = T₄₄₃).

The spelling of 1345984887 in words is "one billion, three hundred forty-five million, nine hundred eighty-four thousand, eight hundred eighty-seven".