83404121 has 2 divisors, whose sum is σ = 83404122. Its totient is φ = 83404120.

The previous prime is 83404117. The next prime is 83404157. The reversal of 83404121 is 12140438.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66912400 + 16491721 = 8180^2 + 4061^2 .

It is a cyclic number.

It is not a de Polignac number, because 83404121 - 2² = 83404117 is a prime.

It is not a weakly prime, because it can be changed into another prime (83404021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41702060 + 41702061.

It is an arithmetic number, because the mean of its divisors is an integer number (41702061).

Almost surely, 2^83404121 is an apocalyptic number.

It is an amenable number.

83404121 is a deficient number, since it is larger than the sum of its proper divisors (1).

83404121 is an equidigital number, since it uses as much as digits as its factorization.

83404121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 83404121 is about 9132.5856689111. The cubic root of 83404121 is about 436.9138748108.

Adding to 83404121 its reverse (12140438), we get a palindrome (95544559).

The spelling of 83404121 in words is "eighty-three million, four hundred four thousand, one hundred twenty-one".