83188813 has 2 divisors, whose sum is σ = 83188814. Its totient is φ = 83188812.

The previous prime is 83188793. The next prime is 83188823. The reversal of 83188813 is 31888138.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77053284 + 6135529 = 8778^2 + 2477^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83188813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83188823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41594406 + 41594407.

It is an arithmetic number, because the mean of its divisors is an integer number (41594407).

Almost surely, 2^83188813 is an apocalyptic number.

It is an amenable number.

83188813 is a deficient number, since it is larger than the sum of its proper divisors (1).

83188813 is an equidigital number, since it uses as much as digits as its factorization.

83188813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36864, while the sum is 40.

The square root of 83188813 is about 9120.7901521743. The cubic root of 83188813 is about 436.5375859817.

The spelling of 83188813 in words is "eighty-three million, one hundred eighty-eight thousand, eight hundred thirteen".