1690444799 has 2 divisors, whose sum is σ = 1690444800. Its totient is φ = 1690444798.

The previous prime is 1690444753. The next prime is 1690444831. The reversal of 1690444799 is 9974440961.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1690444799 - 2¹⁶ = 1690379263 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1690444799.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1690444739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 845222399 + 845222400.

It is an arithmetic number, because the mean of its divisors is an integer number (845222400).

Almost surely, 2^1690444799 is an apocalyptic number.

1690444799 is a deficient number, since it is larger than the sum of its proper divisors (1).

1690444799 is an equidigital number, since it uses as much as digits as its factorization.

1690444799 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1959552, while the sum is 53.

The square root of 1690444799 is about 41115.0191414281. The cubic root of 1690444799 is about 1191.2429164598.

The spelling of 1690444799 in words is "one billion, six hundred ninety million, four hundred forty-four thousand, seven hundred ninety-nine".