505454639 has 2 divisors, whose sum is σ = 505454640. Its totient is φ = 505454638.

The previous prime is 505454611. The next prime is 505454713. The reversal of 505454639 is 936454505.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 505454639 - 2²⁸ = 237019183 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 505454596 and 505454605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505457639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252727319 + 252727320.

It is an arithmetic number, because the mean of its divisors is an integer number (252727320).

Almost surely, 2^505454639 is an apocalyptic number.

505454639 is a deficient number, since it is larger than the sum of its proper divisors (1).

505454639 is an equidigital number, since it uses as much as digits as its factorization.

505454639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324000, while the sum is 41.

The square root of 505454639 is about 22482.3183635496. The cubic root of 505454639 is about 796.5763267911.

The spelling of 505454639 in words is "five hundred five million, four hundred fifty-four thousand, six hundred thirty-nine".