523811945 has 8 divisors (see below), whose sum is σ = 641948544. Its totient is φ = 410133424.

The previous prime is 523811933. The next prime is 523811947. The reversal of 523811945 is 549118325.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 523811945 - 2¹⁰ = 523810921 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 523811899 and 523811908.

It is not an unprimeable number, because it can be changed into a prime (523811947) 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 7 ways as a sum of consecutive naturals, for example, 1114259 + ... + 1114728.

It is an arithmetic number, because the mean of its divisors is an integer number (80243568).

Almost surely, 2^523811945 is an apocalyptic number.

It is an amenable number.

523811945 is a deficient number, since it is larger than the sum of its proper divisors (118136599).

523811945 is a wasteful number, since it uses less digits than its factorization.

523811945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2229039.

The product of its digits is 43200, while the sum is 38.

The square root of 523811945 is about 22886.9383055052. The cubic root of 523811945 is about 806.1053421538.

The spelling of 523811945 in words is "five hundred twenty-three million, eight hundred eleven thousand, nine hundred forty-five".