288697481 has 2 divisors, whose sum is σ = 288697482. Its totient is φ = 288697480.

The previous prime is 288697477. The next prime is 288697499. The reversal of 288697481 is 184796882.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 210975625 + 77721856 = 14525^2 + 8816^2 .

It is a cyclic number.

It is not a de Polignac number, because 288697481 - 2² = 288697477 is a prime.

It is a super-2 number, since 2×288697481² = 166692471071490722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (288693481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144348740 + 144348741.

It is an arithmetic number, because the mean of its divisors is an integer number (144348741).

Almost surely, 2^288697481 is an apocalyptic number.

It is an amenable number.

288697481 is a deficient number, since it is larger than the sum of its proper divisors (1).

288697481 is an equidigital number, since it uses as much as digits as its factorization.

288697481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1548288, while the sum is 53.

The square root of 288697481 is about 16991.1000526746. The cubic root of 288697481 is about 660.9181291422.

The spelling of 288697481 in words is "two hundred eighty-eight million, six hundred ninety-seven thousand, four hundred eighty-one".