821880053 has 2 divisors, whose sum is σ = 821880054. Its totient is φ = 821880052.

The previous prime is 821880041. The next prime is 821880109. The reversal of 821880053 is 350088128.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 527483089 + 294396964 = 22967^2 + 17158^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-821880053 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 821879995 and 821880022.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (821880013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 410940026 + 410940027.

It is an arithmetic number, because the mean of its divisors is an integer number (410940027).

Almost surely, 2^821880053 is an apocalyptic number.

It is an amenable number.

821880053 is a deficient number, since it is larger than the sum of its proper divisors (1).

821880053 is an equidigital number, since it uses as much as digits as its factorization.

821880053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15360, while the sum is 35.

The square root of 821880053 is about 28668.4504813218. The cubic root of 821880053 is about 936.7049460398.

The spelling of 821880053 in words is "eight hundred twenty-one million, eight hundred eighty thousand, fifty-three".