523724945 has 4 divisors (see below), whose sum is σ = 628469940. Its totient is φ = 418979952.

The previous prime is 523724941. The next prime is 523724947. The reversal of 523724945 is 549427325.

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

It can be written as a sum of positive squares in 2 ways, for example, as 278990209 + 244734736 = 16703^2 + 15644^2 .

It is a cyclic number.

It is not a de Polignac number, because 523724945 - 2² = 523724941 is a prime.

It is not an unprimeable number, because it can be changed into a prime (523724941) 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, 52372490 + ... + 52372499.

It is an arithmetic number, because the mean of its divisors is an integer number (157117485).

Almost surely, 2^523724945 is an apocalyptic number.

It is an amenable number.

523724945 is a deficient number, since it is larger than the sum of its proper divisors (104744995).

523724945 is a wasteful number, since it uses less digits than its factorization.

523724945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104744994.

The product of its digits is 302400, while the sum is 41.

The square root of 523724945 is about 22885.0375791695. The cubic root of 523724945 is about 806.0607109661.

The spelling of 523724945 in words is "five hundred twenty-three million, seven hundred twenty-four thousand, nine hundred forty-five".