289371431 has 2 divisors, whose sum is σ = 289371432. Its totient is φ = 289371430.

The previous prime is 289371389. The next prime is 289371469. The reversal of 289371431 is 134173982.

It is an a-pointer prime, because the next prime (289371469) can be obtained adding 289371431 to its sum of digits (38).

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-289371431 is a prime.

It is a super-2 number, since 2×289371431² = 167471650157975522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (289371491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144685715 + 144685716.

It is an arithmetic number, because the mean of its divisors is an integer number (144685716).

Almost surely, 2^289371431 is an apocalyptic number.

289371431 is a deficient number, since it is larger than the sum of its proper divisors (1).

289371431 is an equidigital number, since it uses as much as digits as its factorization.

289371431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 38.

The square root of 289371431 is about 17010.9209333299. The cubic root of 289371431 is about 661.4320230313.

The spelling of 289371431 in words is "two hundred eighty-nine million, three hundred seventy-one thousand, four hundred thirty-one".