523890505 has 4 divisors (see below), whose sum is σ = 628668612. Its totient is φ = 419112400.

The previous prime is 523890473. The next prime is 523890517. The reversal of 523890505 is 505098325.

523890505 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

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 399880009 + 124010496 = 19997^2 + 11136^2 .

It is not a de Polignac number, because 523890505 - 2⁵ = 523890473 is a prime.

It is a super-2 number, since 2×523890505² = 548922522458310050, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52389046 + ... + 52389055.

It is an arithmetic number, because the mean of its divisors is an integer number (157167153).

Almost surely, 2^523890505 is an apocalyptic number.

It is an amenable number.

523890505 is a deficient number, since it is larger than the sum of its proper divisors (104778107).

523890505 is a wasteful number, since it uses less digits than its factorization.

523890505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104778106.

The product of its (nonzero) digits is 54000, while the sum is 37.

The square root of 523890505 is about 22888.6545039240. The cubic root of 523890505 is about 806.1456393576.

The spelling of 523890505 in words is "five hundred twenty-three million, eight hundred ninety thousand, five hundred five".