1690019 has 2 divisors, whose sum is σ = 1690020. Its totient is φ = 1690018.

The previous prime is 1690009. The next prime is 1690043. The reversal of 1690019 is 9100961.

It is a weak prime.

It is an emirp because it is prime and its reverse (9100961) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1690019 - 2⁸ = 1689763 is a prime.

It is a super-2 number, since 2×1690019² = 5712328440722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1690019.

It is not a weakly prime, because it can be changed into another prime (1690009) 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, 845009 + 845010.

It is an arithmetic number, because the mean of its divisors is an integer number (845010).

2^1690019 is an apocalyptic number.

1690019 is a deficient number, since it is larger than the sum of its proper divisors (1).

1690019 is an equidigital number, since it uses as much as digits as its factorization.

1690019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 486, while the sum is 26.

The square root of 1690019 is about 1300.0073076718. The cubic root of 1690019 is about 119.1142889012.

The spelling of 1690019 in words is "one million, six hundred ninety thousand, nineteen".