1897139845403 has 16 divisors (see below), whose sum is σ = 2093665262976. Its totient is φ = 1704696901440.

The previous prime is 1897139845397. The next prime is 1897139845451. The reversal of 1897139845403 is 3045489317981.

It is a cyclic number.

It is not a de Polignac number, because 1897139845403 - 2⁶ = 1897139845339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1897139865403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1297826 + ... + 2340647.

It is an arithmetic number, because the mean of its divisors is an integer number (130854078936).

Almost surely, 2^{1897139845403} is an apocalyptic number.

1897139845403 is a deficient number, since it is larger than the sum of its proper divisors (196525417573).

1897139845403 is a wasteful number, since it uses less digits than its factorization.

1897139845403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3639034.

The product of its (nonzero) digits is 26127360, while the sum is 62.

The spelling of 1897139845403 in words is "one trillion, eight hundred ninety-seven billion, one hundred thirty-nine million, eight hundred forty-five thousand, four hundred three".