181194043 has 2 divisors, whose sum is σ = 181194044. Its totient is φ = 181194042.

The previous prime is 181194037. The next prime is 181194053. The reversal of 181194043 is 340491181.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 181194043 - 2²¹ = 179096891 is a prime.

It is equal to p_10092991 and since 181194043 and 10092991 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 181193996 and 181194014.

It is not a weakly prime, because it can be changed into another prime (181194053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90597021 + 90597022.

It is an arithmetic number, because the mean of its divisors is an integer number (90597022).

Almost surely, 2^181194043 is an apocalyptic number.

181194043 is a deficient number, since it is larger than the sum of its proper divisors (1).

181194043 is an equidigital number, since it uses as much as digits as its factorization.

181194043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 181194043 is about 13460.8336666048. The cubic root of 181194043 is about 565.8673529091.

The spelling of 181194043 in words is "one hundred eighty-one million, one hundred ninety-four thousand, forty-three".