523123401 has 4 divisors (see below), whose sum is σ = 697497872. Its totient is φ = 348748932.

The previous prime is 523123397. The next prime is 523123417. The reversal of 523123401 is 104321325.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 523123401 - 2² = 523123397 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (523122401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87187231 + ... + 87187236.

It is an arithmetic number, because the mean of its divisors is an integer number (174374468).

Almost surely, 2^523123401 is an apocalyptic number.

It is an amenable number.

523123401 is a deficient number, since it is larger than the sum of its proper divisors (174374471).

523123401 is a wasteful number, since it uses less digits than its factorization.

523123401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174374470.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 523123401 is about 22871.8910674216. The cubic root of 523123401 is about 805.7519822779.

Adding to 523123401 its reverse (104321325), we get a palindrome (627444726).

The spelling of 523123401 in words is "five hundred twenty-three million, one hundred twenty-three thousand, four hundred one".