83788181 has 2 divisors, whose sum is σ = 83788182. Its totient is φ = 83788180.

The previous prime is 83788151. The next prime is 83788193. The reversal of 83788181 is 18188738.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82719025 + 1069156 = 9095^2 + 1034^2 .

It is a cyclic number.

It is not a de Polignac number, because 83788181 - 2¹⁰ = 83787157 is a prime.

It is a super-2 number, since 2×83788181² = 14040918550577522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83788151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41894090 + 41894091.

It is an arithmetic number, because the mean of its divisors is an integer number (41894091).

Almost surely, 2^83788181 is an apocalyptic number.

It is an amenable number.

83788181 is a deficient number, since it is larger than the sum of its proper divisors (1).

83788181 is an equidigital number, since it uses as much as digits as its factorization.

83788181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 86016, while the sum is 44.

The square root of 83788181 is about 9153.5884220343. The cubic root of 83788181 is about 437.5834829533.

The spelling of 83788181 in words is "eighty-three million, seven hundred eighty-eight thousand, one hundred eighty-one".