1697768089 has 2 divisors, whose sum is σ = 1697768090. Its totient is φ = 1697768088.

The previous prime is 1697768077. The next prime is 1697768113. The reversal of 1697768089 is 9808677961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 907033689 + 790734400 = 30117^2 + 28120^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1697768089 is a prime.

It is not a weakly prime, because it can be changed into another prime (1697768029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 848884044 + 848884045.

It is an arithmetic number, because the mean of its divisors is an integer number (848884045).

Almost surely, 2^1697768089 is an apocalyptic number.

It is an amenable number.

1697768089 is a deficient number, since it is larger than the sum of its proper divisors (1).

1697768089 is an equidigital number, since it uses as much as digits as its factorization.

1697768089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9144576, while the sum is 61.

The square root of 1697768089 is about 41203.9814702414. The cubic root of 1697768089 is about 1192.9606596037.

The spelling of 1697768089 in words is "one billion, six hundred ninety-seven million, seven hundred sixty-eight thousand, eighty-nine".