102820841 has 2 divisors, whose sum is σ = 102820842. Its totient is φ = 102820840.

The previous prime is 102820793. The next prime is 102820853. The reversal of 102820841 is 148028201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100801600 + 2019241 = 10040^2 + 1421^2 .

It is a cyclic number.

It is not a de Polignac number, because 102820841 - 2¹⁰ = 102819817 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 102820841.

It is not a weakly prime, because it can be changed into another prime (102823841) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51410420 + 51410421.

It is an arithmetic number, because the mean of its divisors is an integer number (51410421).

Almost surely, 2^102820841 is an apocalyptic number.

It is an amenable number.

102820841 is a deficient number, since it is larger than the sum of its proper divisors (1).

102820841 is an equidigital number, since it uses as much as digits as its factorization.

102820841 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1024, while the sum is 26.

The square root of 102820841 is about 10140.0611931092. The cubic root of 102820841 is about 468.4828717759.

The spelling of 102820841 in words is "one hundred two million, eight hundred twenty thousand, eight hundred forty-one".