288844981 has 2 divisors, whose sum is σ = 288844982. Its totient is φ = 288844980.

The previous prime is 288844931. The next prime is 288845003. The reversal of 288844981 is 189448882.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 281232900 + 7612081 = 16770^2 + 2759^2 .

It is a cyclic number.

It is not a de Polignac number, because 288844981 - 2²³ = 280456373 is a prime.

It is a super-2 number, since 2×288844981² = 166862846097780722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (288844921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144422490 + 144422491.

It is an arithmetic number, because the mean of its divisors is an integer number (144422491).

Almost surely, 2^288844981 is an apocalyptic number.

It is an amenable number.

288844981 is a deficient number, since it is larger than the sum of its proper divisors (1).

288844981 is an equidigital number, since it uses as much as digits as its factorization.

288844981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1179648, while the sum is 52.

The square root of 288844981 is about 16995.4400060722. The cubic root of 288844981 is about 661.0306677370.

The spelling of 288844981 in words is "two hundred eighty-eight million, eight hundred forty-four thousand, nine hundred eighty-one".