83638393 has 2 divisors, whose sum is σ = 83638394. Its totient is φ = 83638392.

The previous prime is 83638339. The next prime is 83638411. The reversal of 83638393 is 39383638.

Together with previous prime (83638339) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53465344 + 30173049 = 7312^2 + 5493^2 .

It is a cyclic number.

It is not a de Polignac number, because 83638393 - 2¹⁷ = 83507321 is a prime.

It is not a weakly prime, because it can be changed into another prime (83638493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41819196 + 41819197.

It is an arithmetic number, because the mean of its divisors is an integer number (41819197).

Almost surely, 2^83638393 is an apocalyptic number.

It is an amenable number.

83638393 is a deficient number, since it is larger than the sum of its proper divisors (1).

83638393 is an equidigital number, since it uses as much as digits as its factorization.

83638393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 279936, while the sum is 43.

The square root of 83638393 is about 9145.4028342113. The cubic root of 83638393 is about 437.3225716454.

The spelling of 83638393 in words is "eighty-three million, six hundred thirty-eight thousand, three hundred ninety-three".