525649867 has 2 divisors, whose sum is σ = 525649868. Its totient is φ = 525649866.

The previous prime is 525649847. The next prime is 525649921. The reversal of 525649867 is 768946525.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-525649867 is a prime.

It is not a weakly prime, because it can be changed into another prime (525649837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 262824933 + 262824934.

It is an arithmetic number, because the mean of its divisors is an integer number (262824934).

Almost surely, 2^525649867 is an apocalyptic number.

525649867 is a deficient number, since it is larger than the sum of its proper divisors (1).

525649867 is an equidigital number, since it uses as much as digits as its factorization.

525649867 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3628800, while the sum is 52.

The square root of 525649867 is about 22927.0553495210. The cubic root of 525649867 is about 807.0470473614.

The spelling of 525649867 in words is "five hundred twenty-five million, six hundred forty-nine thousand, eight hundred sixty-seven".