1690404094217 has 4 divisors (see below), whose sum is σ = 1736090691396. Its totient is φ = 1644717497040.

The previous prime is 1690404094213. The next prime is 1690404094277. The reversal of 1690404094217 is 7124904040961.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1110949728256 + 579454365961 = 1054016^2 + 761219^2 .

It is a cyclic number.

It is not a de Polignac number, because 1690404094217 - 2² = 1690404094213 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1690404094213) 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 in 3 ways as a sum of consecutive naturals, for example, 22843298534 + ... + 22843298607.

It is an arithmetic number, because the mean of its divisors is an integer number (434022672849).

Almost surely, 2^{1690404094217} is an apocalyptic number.

It is an amenable number.

1690404094217 is a deficient number, since it is larger than the sum of its proper divisors (45686597179).

1690404094217 is an equidigital number, since it uses as much as digits as its factorization.

1690404094217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45686597178.

The product of its (nonzero) digits is 435456, while the sum is 47.

The spelling of 1690404094217 in words is "one trillion, six hundred ninety billion, four hundred four million, ninety-four thousand, two hundred seventeen".