181896401 has 2 divisors, whose sum is σ = 181896402. Its totient is φ = 181896400.

The previous prime is 181896361. The next prime is 181896419. The reversal of 181896401 is 104698181.

181896401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 105596176 + 76300225 = 10276^2 + 8735^2 .

It is a cyclic number.

It is not a de Polignac number, because 181896401 - 2²⁶ = 114787537 is a prime.

It is not a weakly prime, because it can be changed into another prime (181896301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90948200 + 90948201.

It is an arithmetic number, because the mean of its divisors is an integer number (90948201).

Almost surely, 2^181896401 is an apocalyptic number.

It is an amenable number.

181896401 is a deficient number, since it is larger than the sum of its proper divisors (1).

181896401 is an equidigital number, since it uses as much as digits as its factorization.

181896401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 38.

The square root of 181896401 is about 13486.8973822744. The cubic root of 181896401 is about 566.5975627766.

The spelling of 181896401 in words is "one hundred eighty-one million, eight hundred ninety-six thousand, four hundred one".