183778081 has 2 divisors, whose sum is σ = 183778082. Its totient is φ = 183778080.

The previous prime is 183778079. The next prime is 183778093. The reversal of 183778081 is 180877381.

It is a happy number.

183778081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 128051856 + 55726225 = 11316^2 + 7465^2 .

It is an emirp because it is prime and its reverse (180877381) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 183778081 - 2¹ = 183778079 is a prime.

It is a super-2 number, since 2×183778081² = 67548766112085122, which contains 22 as substring.

Together with 183778079, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (183478081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 91889040 + 91889041.

It is an arithmetic number, because the mean of its divisors is an integer number (91889041).

Almost surely, 2^183778081 is an apocalyptic number.

It is an amenable number.

183778081 is a deficient number, since it is larger than the sum of its proper divisors (1).

183778081 is an equidigital number, since it uses as much as digits as its factorization.

183778081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75264, while the sum is 43.

The square root of 183778081 is about 13556.4774554454. The cubic root of 183778081 is about 568.5446416192.

The spelling of 183778081 in words is "one hundred eighty-three million, seven hundred seventy-eight thousand, eighty-one".