670403 has 4 divisors (see below), whose sum is σ = 688560. Its totient is φ = 652248.

The previous prime is 670399. The next prime is 670409. The reversal of 670403 is 304076.

670403 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 670403 - 2² = 670399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (670409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9023 + ... + 9096.

It is an arithmetic number, because the mean of its divisors is an integer number (172140).

2⁶⁷⁰⁴⁰³ is an apocalyptic number.

670403 is a deficient number, since it is larger than the sum of its proper divisors (18157).

670403 is a wasteful number, since it uses less digits than its factorization.

670403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18156.

The product of its (nonzero) digits is 504, while the sum is 20.

The square root of 670403 is about 818.7814116112. The cubic root of 670403 is about 87.5209419262.

Adding to 670403 its reverse (304076), we get a palindrome (974479).

The spelling of 670403 in words is "six hundred seventy thousand, four hundred three".