525969509 has 8 divisors (see below), whose sum is σ = 577116792. Its totient is φ = 476349120.

The previous prime is 525969503. The next prime is 525969547. The reversal of 525969509 is 905969525.

It can be written as a sum of positive squares in 4 ways, for example, as 51165409 + 474804100 = 7153^2 + 21790^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 525969509 - 2²⁴ = 509192293 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 (525969503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 381002 + ... + 382379.

It is an arithmetic number, because the mean of its divisors is an integer number (72139599).

Almost surely, 2^525969509 is an apocalyptic number.

It is an amenable number.

525969509 is a deficient number, since it is larger than the sum of its proper divisors (51147283).

525969509 is a wasteful number, since it uses less digits than its factorization.

525969509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 763447.

The product of its (nonzero) digits is 1093500, while the sum is 50.

The square root of 525969509 is about 22934.0251373369. The cubic root of 525969509 is about 807.2105997419.

The spelling of 525969509 in words is "five hundred twenty-five million, nine hundred sixty-nine thousand, five hundred nine".