525434909 has 2 divisors, whose sum is σ = 525434910. Its totient is φ = 525434908.

The previous prime is 525434893. The next prime is 525434933. The reversal of 525434909 is 909434525.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 517426009 + 8008900 = 22747^2 + 2830^2 .

It is a cyclic number.

It is not a de Polignac number, because 525434909 - 2⁴ = 525434893 is a prime.

It is a Chen prime.

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

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (525434809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 262717454 + 262717455.

It is an arithmetic number, because the mean of its divisors is an integer number (262717455).

Almost surely, 2^525434909 is an apocalyptic number.

It is an amenable number.

525434909 is a deficient number, since it is larger than the sum of its proper divisors (1).

525434909 is an equidigital number, since it uses as much as digits as its factorization.

525434909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 194400, while the sum is 41.

The square root of 525434909 is about 22922.3670025589. The cubic root of 525434909 is about 806.9370217321.

The spelling of 525434909 in words is "five hundred twenty-five million, four hundred thirty-four thousand, nine hundred nine".