73189197889 has 4 divisors (see below), whose sum is σ = 73189854340. Its totient is φ = 73188541440.

The previous prime is 73189197881. The next prime is 73189197901. The reversal of 73189197889 is 98879198137.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 49259583025 + 23929614864 = 221945^2 + 154692^2 .

It is a cyclic number.

It is not a de Polignac number, because 73189197889 - 2³ = 73189197881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73189197881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114672 + ... + 399409.

It is an arithmetic number, because the mean of its divisors is an integer number (18297463585).

Almost surely, 2^73189197889 is an apocalyptic number.

It is an amenable number.

73189197889 is a deficient number, since it is larger than the sum of its proper divisors (656451).

73189197889 is a wasteful number, since it uses less digits than its factorization.

73189197889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656450.

The product of its digits is 54867456, while the sum is 70.

The spelling of 73189197889 in words is "seventy-three billion, one hundred eighty-nine million, one hundred ninety-seven thousand, eight hundred eighty-nine".