289879451691 has 16 divisors (see below), whose sum is σ = 389451131904. Its totient is φ = 191784456864.

The previous prime is 289879451663. The next prime is 289879451713. The reversal of 289879451691 is 196154978982.

It is not a de Polignac number, because 289879451691 - 2⁹ = 289879451179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (289879451621) 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 15 ways as a sum of consecutive naturals, for example, 226651 + ... + 794436.

It is an arithmetic number, because the mean of its divisors is an integer number (24340695744).

Almost surely, 2^289879451691 is an apocalyptic number.

289879451691 is a deficient number, since it is larger than the sum of its proper divisors (99571680213).

289879451691 is a wasteful number, since it uses less digits than its factorization.

289879451691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1021810.

The product of its digits is 78382080, while the sum is 69.

The spelling of 289879451691 in words is "two hundred eighty-nine billion, eight hundred seventy-nine million, four hundred fifty-one thousand, six hundred ninety-one".