361601813 has 2 divisors, whose sum is σ = 361601814. Its totient is φ = 361601812.

The previous prime is 361601771. The next prime is 361601843. The reversal of 361601813 is 318106163.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 330039889 + 31561924 = 18167^2 + 5618^2 .

It is an emirp because it is prime and its reverse (318106163) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 361601813 - 2²⁶ = 294492949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (361601843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 180800906 + 180800907.

It is an arithmetic number, because the mean of its divisors is an integer number (180800907).

Almost surely, 2^361601813 is an apocalyptic number.

It is an amenable number.

361601813 is a deficient number, since it is larger than the sum of its proper divisors (1).

361601813 is an equidigital number, since it uses as much as digits as its factorization.

361601813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 361601813 is about 19015.8305892748. The cubic root of 361601813 is about 712.4321883960.

Adding to 361601813 its reverse (318106163), we get a palindrome (679707976).

It can be divided in two parts, 36160 and 1813, that added together give a palindrome (37973).

The spelling of 361601813 in words is "three hundred sixty-one million, six hundred one thousand, eight hundred thirteen".