523906465 has 4 divisors (see below), whose sum is σ = 628687764. Its totient is φ = 419125168.

The previous prime is 523906463. The next prime is 523906477. The reversal of 523906465 is 564609325.

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 188870049 + 335036416 = 13743^2 + 18304^2 .

It is a cyclic number.

It is not a de Polignac number, because 523906465 - 2¹ = 523906463 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (523906463) 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, 52390642 + ... + 52390651.

It is an arithmetic number, because the mean of its divisors is an integer number (157171941).

Almost surely, 2^523906465 is an apocalyptic number.

It is an amenable number.

523906465 is a deficient number, since it is larger than the sum of its proper divisors (104781299).

523906465 is a wasteful number, since it uses less digits than its factorization.

523906465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104781298.

The product of its (nonzero) digits is 194400, while the sum is 40.

The square root of 523906465 is about 22889.0031456156. The cubic root of 523906465 is about 806.1538255171.

The spelling of 523906465 in words is "five hundred twenty-three million, nine hundred six thousand, four hundred sixty-five".