525668069 has 4 divisors (see below), whose sum is σ = 536852544. Its totient is φ = 514483596.

The previous prime is 525668029. The next prime is 525668107. The reversal of 525668069 is 960866525.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 525668069 - 2¹² = 525663973 is a prime.

It is a super-2 number, since 2×525668069² = 552653837532377522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (47), and also a Moran number because the ratio is a prime number: 11184427 = 525668069 / (5 + 2 + 5 + 6 + 6 + 8 + 0 + 6 + 9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (525668009) 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 in 3 ways as a sum of consecutive naturals, for example, 5592167 + ... + 5592260.

It is an arithmetic number, because the mean of its divisors is an integer number (134213136).

Almost surely, 2^525668069 is an apocalyptic number.

It is an amenable number.

525668069 is a deficient number, since it is larger than the sum of its proper divisors (11184475).

525668069 is a wasteful number, since it uses less digits than its factorization.

525668069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11184474.

The product of its (nonzero) digits is 777600, while the sum is 47.

The square root of 525668069 is about 22927.4523006809. The cubic root of 525668069 is about 807.0563626247.

The spelling of 525668069 in words is "five hundred twenty-five million, six hundred sixty-eight thousand, sixty-nine".