523123307 has 4 divisors (see below), whose sum is σ = 597855216. Its totient is φ = 448391400.

The previous prime is 523123297. The next prime is 523123379. The reversal of 523123307 is 703321325.

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 523123307 - 2¹² = 523119211 is a prime.

It is a super-4 number, since 4×523123307⁴ (a number of 36 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (523123397) 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, 37365944 + ... + 37365957.

It is an arithmetic number, because the mean of its divisors is an integer number (149463804).

Almost surely, 2^523123307 is an apocalyptic number.

523123307 is a deficient number, since it is larger than the sum of its proper divisors (74731909).

523123307 is an equidigital number, since it uses as much as digits as its factorization.

523123307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74731908.

The product of its (nonzero) digits is 3780, while the sum is 26.

The square root of 523123307 is about 22871.8890124974. The cubic root of 523123307 is about 805.7519340161.

The spelling of 523123307 in words is "five hundred twenty-three million, one hundred twenty-three thousand, three hundred seven".