288693481 has 2 divisors, whose sum is σ = 288693482. Its totient is φ = 288693480.

The previous prime is 288693407. The next prime is 288693547. The reversal of 288693481 is 184396882.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 213160000 + 75533481 = 14600^2 + 8691^2 .

It is a cyclic number.

It is not a de Polignac number, because 288693481 - 2⁹ = 288692969 is a prime.

It is a super-2 number, since 2×288693481² = 166687851943794722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (288693281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144346740 + 144346741.

It is an arithmetic number, because the mean of its divisors is an integer number (144346741).

Almost surely, 2^288693481 is an apocalyptic number.

It is an amenable number.

288693481 is a deficient number, since it is larger than the sum of its proper divisors (1).

288693481 is an equidigital number, since it uses as much as digits as its factorization.

288693481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 663552, while the sum is 49.

The square root of 288693481 is about 16990.9823435845. The cubic root of 288693481 is about 660.9150767143.

The spelling of 288693481 in words is "two hundred eighty-eight million, six hundred ninety-three thousand, four hundred eighty-one".