83620013 has 2 divisors, whose sum is σ = 83620014. Its totient is φ = 83620012.

The previous prime is 83620001. The next prime is 83620027. The reversal of 83620013 is 31002638.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81775849 + 1844164 = 9043^2 + 1358^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83620013 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 (83620213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41810006 + 41810007.

It is an arithmetic number, because the mean of its divisors is an integer number (41810007).

Almost surely, 2^83620013 is an apocalyptic number.

It is an amenable number.

83620013 is a deficient number, since it is larger than the sum of its proper divisors (1).

83620013 is an equidigital number, since it uses as much as digits as its factorization.

83620013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 83620013 is about 9144.3979025412. The cubic root of 83620013 is about 437.2905346129.

The spelling of 83620013 in words is "eighty-three million, six hundred twenty thousand, thirteen".