1690408193 has 2 divisors, whose sum is σ = 1690408194. Its totient is φ = 1690408192.

The previous prime is 1690408189. The next prime is 1690408201. The reversal of 1690408193 is 3918040961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1114024129 + 576384064 = 33377^2 + 24008^2 .

It is a cyclic number.

It is not a de Polignac number, because 1690408193 - 2² = 1690408189 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1690408193.

It is not a weakly prime, because it can be changed into another prime (1690408493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 845204096 + 845204097.

It is an arithmetic number, because the mean of its divisors is an integer number (845204097).

Almost surely, 2^1690408193 is an apocalyptic number.

It is an amenable number.

1690408193 is a deficient number, since it is larger than the sum of its proper divisors (1).

1690408193 is an equidigital number, since it uses as much as digits as its factorization.

1690408193 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 1690408193 is about 41114.5739732275. The cubic root of 1690408193 is about 1191.2343177461.

The spelling of 1690408193 in words is "one billion, six hundred ninety million, four hundred eight thousand, one hundred ninety-three".