3639999361 has 2 divisors, whose sum is σ = 3639999362. Its totient is φ = 3639999360.

The previous prime is 3639999359. The next prime is 3639999413. The reversal of 3639999361 is 1639999363.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3537989361 + 102010000 = 59481^2 + 10100^2 .

It is a cyclic number.

It is not a de Polignac number, because 3639999361 - 2¹ = 3639999359 is a prime.

Together with 3639999359, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 3639999296 and 3639999305.

It is not a weakly prime, because it can be changed into another prime (3139999361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1819999680 + 1819999681.

It is an arithmetic number, because the mean of its divisors is an integer number (1819999681).

Almost surely, 2^3639999361 is an apocalyptic number.

It is an amenable number.

3639999361 is a deficient number, since it is larger than the sum of its proper divisors (1).

3639999361 is an equidigital number, since it uses as much as digits as its factorization.

3639999361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6377292, while the sum is 58.

The square root of 3639999361 is about 60332.4072203323. The cubic root of 3639999361 is about 1538.2742461818.

The spelling of 3639999361 in words is "three billion, six hundred thirty-nine million, nine hundred ninety-nine thousand, three hundred sixty-one".