528365921 has 2 divisors, whose sum is σ = 528365922. Its totient is φ = 528365920.

The previous prime is 528365911. The next prime is 528365939. The reversal of 528365921 is 129563825.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 528310225 + 55696 = 22985^2 + 236^2 .

It is a cyclic number.

It is not a de Polignac number, because 528365921 - 2⁶ = 528365857 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (528365911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 264182960 + 264182961.

It is an arithmetic number, because the mean of its divisors is an integer number (264182961).

Almost surely, 2^528365921 is an apocalyptic number.

It is an amenable number.

528365921 is a deficient number, since it is larger than the sum of its proper divisors (1).

528365921 is an equidigital number, since it uses as much as digits as its factorization.

528365921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129600, while the sum is 41.

The square root of 528365921 is about 22986.2115408346. The cubic root of 528365921 is about 808.4346749714.

The spelling of 528365921 in words is "five hundred twenty-eight million, three hundred sixty-five thousand, nine hundred twenty-one".