1913866885 has 16 divisors (see below), whose sum is σ = 2779128576. Its totient is φ = 1235167488.

The previous prime is 1913866883. The next prime is 1913866891. The reversal of 1913866885 is 5886683191.

It is a cyclic number.

It is not a de Polignac number, because 1913866885 - 2¹ = 1913866883 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1913866883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1607697 + ... + 1608886.

It is an arithmetic number, because the mean of its divisors is an integer number (173695536).

Almost surely, 2^1913866885 is an apocalyptic number.

It is an amenable number.

1913866885 is a deficient number, since it is larger than the sum of its proper divisors (865261691).

1913866885 is a wasteful number, since it uses less digits than its factorization.

1913866885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3216612.

The product of its digits is 2488320, while the sum is 55.

The square root of 1913866885 is about 43747.7643428781. The cubic root of 1913866885 is about 1241.5681869756.

The spelling of 1913866885 in words is "one billion, nine hundred thirteen million, eight hundred sixty-six thousand, eight hundred eighty-five".