288877681 has 2 divisors, whose sum is σ = 288877682. Its totient is φ = 288877680.

The previous prime is 288877643. The next prime is 288877697. The reversal of 288877681 is 186778882.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 170067681 + 118810000 = 13041^2 + 10900^2 .

It is a cyclic number.

It is not a de Polignac number, because 288877681 - 2⁷ = 288877553 is a prime.

It is a super-2 number, since 2×288877681² = 166900629159875522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (288877621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144438840 + 144438841.

It is an arithmetic number, because the mean of its divisors is an integer number (144438841).

Almost surely, 2^288877681 is an apocalyptic number.

It is an amenable number.

288877681 is a deficient number, since it is larger than the sum of its proper divisors (1).

288877681 is an equidigital number, since it uses as much as digits as its factorization.

288877681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2408448, while the sum is 55.

The square root of 288877681 is about 16996.4020016002. The cubic root of 288877681 is about 661.0556117827.

It can be divided in two parts, 288 and 877681, that added together give a square (877969 = 937²).

The spelling of 288877681 in words is "two hundred eighty-eight million, eight hundred seventy-seven thousand, six hundred eighty-one".