181404474197 has 2 divisors, whose sum is σ = 181404474198. Its totient is φ = 181404474196.

The previous prime is 181404474151. The next prime is 181404474241. The reversal of 181404474197 is 791474404181.

It is a happy number.

181404474197 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., 177107147281 + 4297326916 = 420841^2 + 65554^2 .

It is a cyclic number.

It is not a de Polignac number, because 181404474197 - 2³⁶ = 112684997461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (181404474137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90702237098 + 90702237099.

It is an arithmetic number, because the mean of its divisors is an integer number (90702237099).

Almost surely, 2^181404474197 is an apocalyptic number.

It is an amenable number.

181404474197 is a deficient number, since it is larger than the sum of its proper divisors (1).

181404474197 is an equidigital number, since it uses as much as digits as its factorization.

181404474197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 903168, while the sum is 50.

The spelling of 181404474197 in words is "one hundred eighty-one billion, four hundred four million, four hundred seventy-four thousand, one hundred ninety-seven".