1889933908739 has 4 divisors (see below), whose sum is σ = 2001106491624. Its totient is φ = 1778761325856.

The previous prime is 1889933908721. The next prime is 1889933908771. The reversal of 1889933908739 is 9378093399881.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1889933908739 - 2²⁰ = 1889932860163 is a prime.

It is a super-3 number, since 3×1889933908739³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1889933908739.

It is not an unprimeable number, because it can be changed into a prime (1889933928739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55586291417 + ... + 55586291450.

It is an arithmetic number, because the mean of its divisors is an integer number (500276622906).

Almost surely, 2^{1889933908739} is an apocalyptic number.

1889933908739 is a deficient number, since it is larger than the sum of its proper divisors (111172582885).

1889933908739 is a wasteful number, since it uses less digits than its factorization.

1889933908739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111172582884.

The product of its (nonzero) digits is 634894848, while the sum is 77.

The spelling of 1889933908739 in words is "one trillion, eight hundred eighty-nine billion, nine hundred thirty-three million, nine hundred eight thousand, seven hundred thirty-nine".