820428527 has 2 divisors, whose sum is σ = 820428528. Its totient is φ = 820428526.

The previous prime is 820428481. The next prime is 820428533. The reversal of 820428527 is 725824028.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 820428527 - 2²⁴ = 803651311 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (820425527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 410214263 + 410214264.

It is an arithmetic number, because the mean of its divisors is an integer number (410214264).

Almost surely, 2^820428527 is an apocalyptic number.

820428527 is a deficient number, since it is larger than the sum of its proper divisors (1).

820428527 is an equidigital number, since it uses as much as digits as its factorization.

820428527 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 71680, while the sum is 38.

The square root of 820428527 is about 28643.1235552270. The cubic root of 820428527 is about 936.1531815037.

The spelling of 820428527 in words is "eight hundred twenty million, four hundred twenty-eight thousand, five hundred twenty-seven".