83503421 has 2 divisors, whose sum is σ = 83503422. Its totient is φ = 83503420.

The previous prime is 83503417. The next prime is 83503447. The reversal of 83503421 is 12430538.

It is an a-pointer prime, because the next prime (83503447) can be obtained adding 83503421 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70644025 + 12859396 = 8405^2 + 3586^2 .

It is a cyclic number.

It is not a de Polignac number, because 83503421 - 2² = 83503417 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83503411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41751710 + 41751711.

It is an arithmetic number, because the mean of its divisors is an integer number (41751711).

Almost surely, 2^83503421 is an apocalyptic number.

It is an amenable number.

83503421 is a deficient number, since it is larger than the sum of its proper divisors (1).

83503421 is an equidigital number, since it uses as much as digits as its factorization.

83503421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 83503421 is about 9138.0206281229. The cubic root of 83503421 is about 437.0872009427.

Adding to 83503421 its reverse (12430538), we get a palindrome (95933959).

The spelling of 83503421 in words is "eighty-three million, five hundred three thousand, four hundred twenty-one".