1670003 has 2 divisors, whose sum is σ = 1670004.
Its totient is φ = 1670002.
The previous prime is 1669999. The next prime is 1670017. The reversal of 1670003 is 3000761.
It is a weak prime.
It is an emirp because it is prime and its reverse (3000761) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 1670003 - 22 = 1669999 is a prime.
It is not a weakly prime, because it can be changed into another prime (1670093) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 835001 + 835002.
It is an arithmetic number, because the mean of its divisors is an integer number (835002).
21670003 is an apocalyptic number.
1670003 is a deficient number, since it is larger than the sum of its proper divisors (1).
1670003 is an equidigital number, since it uses as much as digits as its factorization.
1670003 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 126, while the sum is 17.
The square root of 1670003 is about 1292.2859590663.
The cubic root of 1670003 is about 118.6421706300.
Adding to 1670003 its reverse (3000761), we get a palindrome (4670764).
The spelling of 1670003 in words is "one million, six hundred seventy thousand, three".