667903 has 2 divisors, whose sum is σ = 667904. Its totient is φ = 667902.

The previous prime is 667883. The next prime is 667921. The reversal of 667903 is 309766.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-667903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333951 + 333952.

It is an arithmetic number, because the mean of its divisors is an integer number (333952).

2⁶⁶⁷⁹⁰³ is an apocalyptic number.

667903 is a deficient number, since it is larger than the sum of its proper divisors (1).

667903 is an equidigital number, since it uses as much as digits as its factorization.

667903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6804, while the sum is 31.

The square root of 667903 is about 817.2533266986. The cubic root of 667903 is about 87.4120149582.

The spelling of 667903 in words is "six hundred sixty-seven thousand, nine hundred three".