288376421 has 2 divisors, whose sum is σ = 288376422. Its totient is φ = 288376420.

The previous prime is 288376391. The next prime is 288376469. The reversal of 288376421 is 124673882.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 228916900 + 59459521 = 15130^2 + 7711^2 .

It is a cyclic number.

It is not a de Polignac number, because 288376421 - 2²² = 284182117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (288376481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144188210 + 144188211.

It is an arithmetic number, because the mean of its divisors is an integer number (144188211).

Almost surely, 2^288376421 is an apocalyptic number.

It is an amenable number.

288376421 is a deficient number, since it is larger than the sum of its proper divisors (1).

288376421 is an equidigital number, since it uses as much as digits as its factorization.

288376421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 129024, while the sum is 41.

The square root of 288376421 is about 16981.6495370738. The cubic root of 288376421 is about 660.6730362711.

The spelling of 288376421 in words is "two hundred eighty-eight million, three hundred seventy-six thousand, four hundred twenty-one".