1690193 has 2 divisors, whose sum is σ = 1690194. Its totient is φ = 1690192.

The previous prime is 1690189. The next prime is 1690211. The reversal of 1690193 is 3910961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1607824 + 82369 = 1268^2 + 287^2 .

It is a cyclic number.

It is not a de Polignac number, because 1690193 - 2² = 1690189 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1690103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 845096 + 845097.

It is an arithmetic number, because the mean of its divisors is an integer number (845097).

2^1690193 is an apocalyptic number.

It is an amenable number.

1690193 is a deficient number, since it is larger than the sum of its proper divisors (1).

1690193 is an equidigital number, since it uses as much as digits as its factorization.

1690193 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1458, while the sum is 29.

The square root of 1690193 is about 1300.0742286500. The cubic root of 1690193 is about 119.1183766610.

It can be divided in two parts, 16 and 90193, that added together give a palindrome (90209).

The spelling of 1690193 in words is "one million, six hundred ninety thousand, one hundred ninety-three".