670903 has 2 divisors, whose sum is σ = 670904. Its totient is φ = 670902.

The previous prime is 670897. The next prime is 670919. The reversal of 670903 is 309076.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-670903 is a prime.

It is a super-2 number, since 2×670903² = 900221670818, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (670963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335451 + 335452.

It is an arithmetic number, because the mean of its divisors is an integer number (335452).

2⁶⁷⁰⁹⁰³ is an apocalyptic number.

670903 is a deficient number, since it is larger than the sum of its proper divisors (1).

670903 is an equidigital number, since it uses as much as digits as its factorization.

670903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1134, while the sum is 25.

The square root of 670903 is about 819.0866864991. The cubic root of 670903 is about 87.5426948103.

Adding to 670903 its reverse (309076), we get a palindrome (979979).

The spelling of 670903 in words is "six hundred seventy thousand, nine hundred three".