820269133 has 2 divisors, whose sum is σ = 820269134. Its totient is φ = 820269132.

The previous prime is 820269127. The next prime is 820269139. The reversal of 820269133 is 331962028.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (820269127) and next prime (820269139).

It can be written as a sum of positive squares in only one way, i.e., 777405924 + 42863209 = 27882^2 + 6547^2 .

It is a cyclic number.

It is not a de Polignac number, because 820269133 - 2⁵ = 820269101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (820269139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 410134566 + 410134567.

It is an arithmetic number, because the mean of its divisors is an integer number (410134567).

Almost surely, 2^820269133 is an apocalyptic number.

It is an amenable number.

820269133 is a deficient number, since it is larger than the sum of its proper divisors (1).

820269133 is an equidigital number, since it uses as much as digits as its factorization.

820269133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 820269133 is about 28640.3410070481. The cubic root of 820269133 is about 936.0925518613.

The spelling of 820269133 in words is "eight hundred twenty million, two hundred sixty-nine thousand, one hundred thirty-three".