525668905 has 4 divisors (see below), whose sum is σ = 630802692. Its totient is φ = 420535120.

The previous prime is 525668867. The next prime is 525668909. The reversal of 525668905 is 509866525.

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 78092569 + 447576336 = 8837^2 + 21156^2 .

It is not a de Polignac number, because 525668905 - 2⁷ = 525668777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (525668909) 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, 52566886 + ... + 52566895.

It is an arithmetic number, because the mean of its divisors is an integer number (157700673).

Almost surely, 2^525668905 is an apocalyptic number.

It is an amenable number.

525668905 is a deficient number, since it is larger than the sum of its proper divisors (105133787).

525668905 is a wasteful number, since it uses less digits than its factorization.

525668905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105133786.

The product of its (nonzero) digits is 648000, while the sum is 46.

The square root of 525668905 is about 22927.4705320932. The cubic root of 525668905 is about 807.0567904604.

The spelling of 525668905 in words is "five hundred twenty-five million, six hundred sixty-eight thousand, nine hundred five".