83591213 has 2 divisors, whose sum is σ = 83591214. Its totient is φ = 83591212.

The previous prime is 83591201. The next prime is 83591219. The reversal of 83591213 is 31219538.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82119844 + 1471369 = 9062^2 + 1213^2 .

It is a cyclic number.

It is not a de Polignac number, because 83591213 - 2⁴ = 83591197 is a prime.

It is a super-2 number, since 2×83591213² = 13974981781622738, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 83591213.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83591219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41795606 + 41795607.

It is an arithmetic number, because the mean of its divisors is an integer number (41795607).

Almost surely, 2^83591213 is an apocalyptic number.

It is an amenable number.

83591213 is a deficient number, since it is larger than the sum of its proper divisors (1).

83591213 is an equidigital number, since it uses as much as digits as its factorization.

83591213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 32.

The square root of 83591213 is about 9142.8230323024. The cubic root of 83591213 is about 437.2403256854.

The spelling of 83591213 in words is "eighty-three million, five hundred ninety-one thousand, two hundred thirteen".