670400403 has 4 divisors (see below), whose sum is σ = 893867208. Its totient is φ = 446933600.

The previous prime is 670400371. The next prime is 670400417. The reversal of 670400403 is 304004076.

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 670400403 - 2⁵ = 670400371 is a prime.

It is not an unprimeable number, because it can be changed into a prime (670400443) 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, 111733398 + ... + 111733403.

It is an arithmetic number, because the mean of its divisors is an integer number (223466802).

Almost surely, 2^670400403 is an apocalyptic number.

670400403 is a deficient number, since it is larger than the sum of its proper divisors (223466805).

670400403 is a wasteful number, since it uses less digits than its factorization.

670400403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223466804.

The product of its (nonzero) digits is 2016, while the sum is 24.

The square root of 670400403 is about 25892.0915145919. The cubic root of 670400403 is about 875.2082891350.

Adding to 670400403 its reverse (304004076), we get a palindrome (974404479).

The spelling of 670400403 in words is "six hundred seventy million, four hundred thousand, four hundred three".