529540909 has 4 divisors (see below), whose sum is σ = 530037340. Its totient is φ = 529044480.

The previous prime is 529540897. The next prime is 529540931. The reversal of 529540909 is 909045925.

It is a happy number.

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 267813225 + 261727684 = 16365^2 + 16178^2 .

It is a cyclic number.

It is not a de Polignac number, because 529540909 - 2¹⁵ = 529508141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (529540969) 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, 246612 + ... + 248749.

It is an arithmetic number, because the mean of its divisors is an integer number (132509335).

Almost surely, 2^529540909 is an apocalyptic number.

It is an amenable number.

529540909 is a deficient number, since it is larger than the sum of its proper divisors (496431).

529540909 is a wasteful number, since it uses less digits than its factorization.

529540909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496430.

The product of its (nonzero) digits is 145800, while the sum is 43.

The square root of 529540909 is about 23011.7558869374. The cubic root of 529540909 is about 809.0335009858.

The spelling of 529540909 in words is "five hundred twenty-nine million, five hundred forty thousand, nine hundred nine".