288500981 has 2 divisors, whose sum is σ = 288500982. Its totient is φ = 288500980.

The previous prime is 288500977. The next prime is 288500987. The reversal of 288500981 is 189005882.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 234243025 + 54257956 = 15305^2 + 7366^2 .

It is a cyclic number.

It is not a de Polignac number, because 288500981 - 2² = 288500977 is a prime.

It is a super-2 number, since 2×288500981² = 166465632075924722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (288500987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144250490 + 144250491.

It is an arithmetic number, because the mean of its divisors is an integer number (144250491).

Almost surely, 2^288500981 is an apocalyptic number.

It is an amenable number.

288500981 is a deficient number, since it is larger than the sum of its proper divisors (1).

288500981 is an equidigital number, since it uses as much as digits as its factorization.

288500981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46080, while the sum is 41.

The square root of 288500981 is about 16985.3166293714. The cubic root of 288500981 is about 660.7681452811.

The spelling of 288500981 in words is "two hundred eighty-eight million, five hundred thousand, nine hundred eighty-one".