83830121 has 2 divisors, whose sum is σ = 83830122. Its totient is φ = 83830120.

The previous prime is 83830081. The next prime is 83830133. The reversal of 83830121 is 12103838.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83539600 + 290521 = 9140^2 + 539^2 .

It is a cyclic number.

It is not a de Polignac number, because 83830121 - 2¹⁸ = 83567977 is a prime.

It is a Sophie Germain prime.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (83830141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41915060 + 41915061.

It is an arithmetic number, because the mean of its divisors is an integer number (41915061).

Almost surely, 2^83830121 is an apocalyptic number.

It is an amenable number.

83830121 is a deficient number, since it is larger than the sum of its proper divisors (1).

83830121 is an equidigital number, since it uses as much as digits as its factorization.

83830121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 83830121 is about 9155.8790402670. The cubic root of 83830121 is about 437.6564812761.

Adding to 83830121 its reverse (12103838), we get a palindrome (95933959).

The spelling of 83830121 in words is "eighty-three million, eight hundred thirty thousand, one hundred twenty-one".