288720823 has 2 divisors, whose sum is σ = 288720824. Its totient is φ = 288720822.

The previous prime is 288720799. The next prime is 288720829. The reversal of 288720823 is 328027882.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 288720823 - 2¹³ = 288712631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (288720829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144360411 + 144360412.

It is an arithmetic number, because the mean of its divisors is an integer number (144360412).

Almost surely, 2^288720823 is an apocalyptic number.

288720823 is a deficient number, since it is larger than the sum of its proper divisors (1).

288720823 is an equidigital number, since it uses as much as digits as its factorization.

288720823 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 86016, while the sum is 40.

The square root of 288720823 is about 16991.7869278072. The cubic root of 288720823 is about 660.9359410228.

The spelling of 288720823 in words is "two hundred eighty-eight million, seven hundred twenty thousand, eight hundred twenty-three".