289116931 has 2 divisors, whose sum is σ = 289116932. Its totient is φ = 289116930.

The previous prime is 289116917. The next prime is 289116959. The reversal of 289116931 is 139611982.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 289116931 - 2²¹ = 287019779 is a prime.

It is a super-2 number, since 2×289116931² = 167177199581717522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (289116031) 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 as a sum of consecutive naturals, namely, 144558465 + 144558466.

It is an arithmetic number, because the mean of its divisors is an integer number (144558466).

Almost surely, 2^289116931 is an apocalyptic number.

289116931 is a deficient number, since it is larger than the sum of its proper divisors (1).

289116931 is an equidigital number, since it uses as much as digits as its factorization.

289116931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 40.

The square root of 289116931 is about 17003.4387992547. The cubic root of 289116931 is about 661.2380579912.

The spelling of 289116931 in words is "two hundred eighty-nine million, one hundred sixteen thousand, nine hundred thirty-one".