523454639 has 2 divisors, whose sum is σ = 523454640. Its totient is φ = 523454638.

The previous prime is 523454587. The next prime is 523454681. The reversal of 523454639 is 936454325.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 523454639 - 2²⁸ = 255019183 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 523454596 and 523454605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (523454699) 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 as a sum of consecutive naturals, namely, 261727319 + 261727320.

It is an arithmetic number, because the mean of its divisors is an integer number (261727320).

Almost surely, 2^523454639 is an apocalyptic number.

523454639 is a deficient number, since it is larger than the sum of its proper divisors (1).

523454639 is an equidigital number, since it uses as much as digits as its factorization.

523454639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 388800, while the sum is 41.

The square root of 523454639 is about 22879.1310805284. The cubic root of 523454639 is about 805.9220118619.

The spelling of 523454639 in words is "five hundred twenty-three million, four hundred fifty-four thousand, six hundred thirty-nine".