3605813989 has 2 divisors, whose sum is σ = 3605813990. Its totient is φ = 3605813988.

The previous prime is 3605813971. The next prime is 3605814089. The reversal of 3605813989 is 9893185063.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2019783364 + 1586030625 = 44942^2 + 39825^2 .

It is a cyclic number.

It is not a de Polignac number, because 3605813989 - 2⁵ = 3605813957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3605813929) 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, 1802906994 + 1802906995.

It is an arithmetic number, because the mean of its divisors is an integer number (1802906995).

Almost surely, 2^3605813989 is an apocalyptic number.

It is an amenable number.

3605813989 is a deficient number, since it is larger than the sum of its proper divisors (1).

3605813989 is an equidigital number, since it uses as much as digits as its factorization.

3605813989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1399680, while the sum is 52.

The square root of 3605813989 is about 60048.4303624999. The cubic root of 3605813989 is about 1533.4434792909.

The spelling of 3605813989 in words is "three billion, six hundred five million, eight hundred thirteen thousand, nine hundred eighty-nine".