670523 has 4 divisors (see below), whose sum is σ = 766320. Its totient is φ = 574728.

The previous prime is 670517. The next prime is 670541. The reversal of 670523 is 325076.

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

It is not a de Polignac number, because 670523 - 2⁴ = 670507 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (670543) 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, 47888 + ... + 47901.

It is an arithmetic number, because the mean of its divisors is an integer number (191580).

2⁶⁷⁰⁵²³ is an apocalyptic number.

670523 is a deficient number, since it is larger than the sum of its proper divisors (95797).

670523 is an equidigital number, since it uses as much as digits as its factorization.

670523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95796.

The product of its (nonzero) digits is 1260, while the sum is 23.

The square root of 670523 is about 818.8546879636. The cubic root of 670523 is about 87.5261636045.

Adding to 670523 its reverse (325076), we get a palindrome (995599).

The spelling of 670523 in words is "six hundred seventy thousand, five hundred twenty-three".