288332861 has 2 divisors, whose sum is σ = 288332862. Its totient is φ = 288332860.

The previous prime is 288332831. The next prime is 288332887. The reversal of 288332861 is 168233882.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 214476025 + 73856836 = 14645^2 + 8594^2 .

It is a cyclic number.

It is not a de Polignac number, because 288332861 - 2⁶ = 288332797 is a prime.

It is equal to p_15653849 and since 288332861 and 15653849 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (288332831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144166430 + 144166431.

It is an arithmetic number, because the mean of its divisors is an integer number (144166431).

Almost surely, 2^288332861 is an apocalyptic number.

It is an amenable number.

288332861 is a deficient number, since it is larger than the sum of its proper divisors (1).

288332861 is an equidigital number, since it uses as much as digits as its factorization.

288332861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 110592, while the sum is 41.

The square root of 288332861 is about 16980.3669277198. The cubic root of 288332861 is about 660.6397691423.

The spelling of 288332861 in words is "two hundred eighty-eight million, three hundred thirty-two thousand, eight hundred sixty-one".