1694390513 has 2 divisors, whose sum is σ = 1694390514. Its totient is φ = 1694390512.

The previous prime is 1694390507. The next prime is 1694390521. The reversal of 1694390513 is 3150934961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1568793664 + 125596849 = 39608^2 + 11207^2 .

It is an emirp because it is prime and its reverse (3150934961) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1694390513 - 2⁶ = 1694390449 is a prime.

It is not a weakly prime, because it can be changed into another prime (1694390563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 847195256 + 847195257.

It is an arithmetic number, because the mean of its divisors is an integer number (847195257).

Almost surely, 2^1694390513 is an apocalyptic number.

It is an amenable number.

1694390513 is a deficient number, since it is larger than the sum of its proper divisors (1).

1694390513 is an equidigital number, since it uses as much as digits as its factorization.

1694390513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 87480, while the sum is 41.

The square root of 1694390513 is about 41162.9750261081. The cubic root of 1694390513 is about 1192.1690339634.

The spelling of 1694390513 in words is "one billion, six hundred ninety-four million, three hundred ninety thousand, five hundred thirteen".