361888889 has 2 divisors, whose sum is σ = 361888890. Its totient is φ = 361888888.

The previous prime is 361888867. The next prime is 361888921. The reversal of 361888889 is 988888163.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 342879289 + 19009600 = 18517^2 + 4360^2 .

It is a cyclic number.

It is not a de Polignac number, because 361888889 - 2¹⁶ = 361823353 is a prime.

It is not a weakly prime, because it can be changed into another prime (361888819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 180944444 + 180944445.

It is an arithmetic number, because the mean of its divisors is an integer number (180944445).

Almost surely, 2^361888889 is an apocalyptic number.

It is an amenable number.

361888889 is a deficient number, since it is larger than the sum of its proper divisors (1).

361888889 is an equidigital number, since it uses as much as digits as its factorization.

361888889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5308416, while the sum is 59.

The square root of 361888889 is about 19023.3774340941. The cubic root of 361888889 is about 712.6206720411.

The spelling of 361888889 in words is "three hundred sixty-one million, eight hundred eighty-eight thousand, eight hundred eighty-nine".