523407 has 4 divisors (see below), whose sum is σ = 697880. Its totient is φ = 348936.

The previous prime is 523403. The next prime is 523417. The reversal of 523407 is 704325.

It is a happy number.

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

It is not a de Polignac number, because 523407 - 2² = 523403 is a prime.

It is a D-number.

It is a Duffinian number.

523407 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (523403) 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, 87232 + ... + 87237.

It is an arithmetic number, because the mean of its divisors is an integer number (174470).

2⁵²³⁴⁰⁷ is an apocalyptic number.

523407 is a deficient number, since it is larger than the sum of its proper divisors (174473).

523407 is a wasteful number, since it uses less digits than its factorization.

523407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174472.

The product of its (nonzero) digits is 840, while the sum is 21.

The square root of 523407 is about 723.4687277277. The cubic root of 523407 is about 80.5897562444.

The spelling of 523407 in words is "five hundred twenty-three thousand, four hundred seven".