1693313989 has 2 divisors, whose sum is σ = 1693313990. Its totient is φ = 1693313988.

The previous prime is 1693313971. The next prime is 1693314001. The reversal of 1693313989 is 9893133961.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1469572225 + 223741764 = 38335^2 + 14958^2 .

It is an emirp because it is prime and its reverse (9893133961) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1693313989 - 2⁵ = 1693313957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1693313969) 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, 846656994 + 846656995.

It is an arithmetic number, because the mean of its divisors is an integer number (846656995).

Almost surely, 2^1693313989 is an apocalyptic number.

It is an amenable number.

1693313989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1693313989 is an equidigital number, since it uses as much as digits as its factorization.

1693313989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 944784, while the sum is 52.

The square root of 1693313989 is about 41149.8965855323. The cubic root of 1693313989 is about 1191.9165005865.

The spelling of 1693313989 in words is "one billion, six hundred ninety-three million, three hundred thirteen thousand, nine hundred eighty-nine".