123820841 has 2 divisors, whose sum is σ = 123820842. Its totient is φ = 123820840.

The previous prime is 123820769. The next prime is 123820859. The reversal of 123820841 is 148028321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 117267241 + 6553600 = 10829^2 + 2560^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123820841 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is equal to p_7046813 and since 123820841 and 7046813 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (123850841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61910420 + 61910421.

It is an arithmetic number, because the mean of its divisors is an integer number (61910421).

Almost surely, 2^123820841 is an apocalyptic number.

It is an amenable number.

123820841 is a deficient number, since it is larger than the sum of its proper divisors (1).

123820841 is an equidigital number, since it uses as much as digits as its factorization.

123820841 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 123820841 is about 11127.4813412560. The cubic root of 123820841 is about 498.4228182263.

The spelling of 123820841 in words is "one hundred twenty-three million, eight hundred twenty thousand, eight hundred forty-one".