670423 has 6 divisors (see below), whose sum is σ = 726144. Its totient is φ = 618696.

The previous prime is 670409. The next prime is 670447. The reversal of 670423 is 324076.

It is not a de Polignac number, because 670423 - 2¹³ = 662231 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 670394 and 670403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670493) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1815 + ... + 2152.

It is an arithmetic number, because the mean of its divisors is an integer number (121024).

2⁶⁷⁰⁴²³ is an apocalyptic number.

670423 is a deficient number, since it is larger than the sum of its proper divisors (55721).

670423 is a wasteful number, since it uses less digits than its factorization.

670423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3993 (or 3980 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 22.

The square root of 670423 is about 818.7936247920. The cubic root of 670423 is about 87.5218122492.

Adding to 670423 its reverse (324076), we get a palindrome (994499).

The spelling of 670423 in words is "six hundred seventy thousand, four hundred twenty-three".