288697891 has 2 divisors, whose sum is σ = 288697892. Its totient is φ = 288697890.

The previous prime is 288697883. The next prime is 288697901. The reversal of 288697891 is 198796882.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 288697891 - 2³ = 288697883 is a prime.

It is not a weakly prime, because it can be changed into another prime (288697861) 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, 144348945 + 144348946.

It is an arithmetic number, because the mean of its divisors is an integer number (144348946).

Almost surely, 2^288697891 is an apocalyptic number.

288697891 is a deficient number, since it is larger than the sum of its proper divisors (1).

288697891 is an equidigital number, since it uses as much as digits as its factorization.

288697891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3483648, while the sum is 58.

The square root of 288697891 is about 16991.1121178103. The cubic root of 288697891 is about 660.9184420145.

The spelling of 288697891 in words is "two hundred eighty-eight million, six hundred ninety-seven thousand, eight hundred ninety-one".