288535861 has 2 divisors, whose sum is σ = 288535862. Its totient is φ = 288535860.

The previous prime is 288535847. The next prime is 288535873. The reversal of 288535861 is 168535882.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 168194961 + 120340900 = 12969^2 + 10970^2 .

It is a cyclic number.

It is not a de Polignac number, because 288535861 - 2⁷ = 288535733 is a prime.

It is a super-2 number, since 2×288535861² = 166505886166022642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (288535831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144267930 + 144267931.

It is an arithmetic number, because the mean of its divisors is an integer number (144267931).

Almost surely, 2^288535861 is an apocalyptic number.

It is an amenable number.

288535861 is a deficient number, since it is larger than the sum of its proper divisors (1).

288535861 is an equidigital number, since it uses as much as digits as its factorization.

288535861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 460800, while the sum is 46.

The square root of 288535861 is about 16986.3433675409. The cubic root of 288535861 is about 660.7947733409.

The spelling of 288535861 in words is "two hundred eighty-eight million, five hundred thirty-five thousand, eight hundred sixty-one".