1693908089 has 2 divisors, whose sum is σ = 1693908090. Its totient is φ = 1693908088.

The previous prime is 1693908079. The next prime is 1693908109. The reversal of 1693908089 is 9808093961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1171008400 + 522899689 = 34220^2 + 22867^2 .

It is an emirp because it is prime and its reverse (9808093961) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1693908089 - 2⁸ = 1693907833 is a prime.

It is a super-2 number, since 2×1693908089² = 5738649227959263842, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1693908089.

It is not a weakly prime, because it can be changed into another prime (1693908019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 846954044 + 846954045.

It is an arithmetic number, because the mean of its divisors is an integer number (846954045).

Almost surely, 2^1693908089 is an apocalyptic number.

It is an amenable number.

1693908089 is a deficient number, since it is larger than the sum of its proper divisors (1).

1693908089 is an equidigital number, since it uses as much as digits as its factorization.

1693908089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 839808, while the sum is 53.

The square root of 1693908089 is about 41157.1146826402. The cubic root of 1693908089 is about 1192.0558791069.

The spelling of 1693908089 in words is "one billion, six hundred ninety-three million, nine hundred eight thousand, eighty-nine".