1690992617 has 2 divisors, whose sum is σ = 1690992618. Its totient is φ = 1690992616.

The previous prime is 1690992553. The next prime is 1690992623. The reversal of 1690992617 is 7162990961.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1689292201 + 1700416 = 41101^2 + 1304^2 .

It is a cyclic number.

It is not a de Polignac number, because 1690992617 - 2⁶ = 1690992553 is a prime.

It is not a weakly prime, because it can be changed into another prime (1690992217) 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, 845496308 + 845496309.

It is an arithmetic number, because the mean of its divisors is an integer number (845496309).

Almost surely, 2^1690992617 is an apocalyptic number.

It is an amenable number.

1690992617 is a deficient number, since it is larger than the sum of its proper divisors (1).

1690992617 is an equidigital number, since it uses as much as digits as its factorization.

1690992617 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 367416, while the sum is 50.

The square root of 1690992617 is about 41121.6806198385. The cubic root of 1690992617 is about 1191.3715835482.

The spelling of 1690992617 in words is "one billion, six hundred ninety million, nine hundred ninety-two thousand, six hundred seventeen".