181830457 has 2 divisors, whose sum is σ = 181830458. Its totient is φ = 181830456.

The previous prime is 181830391. The next prime is 181830491. The reversal of 181830457 is 754038181.

181830457 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., 172685881 + 9144576 = 13141^2 + 3024^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-181830457 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (181831457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90915228 + 90915229.

It is an arithmetic number, because the mean of its divisors is an integer number (90915229).

Almost surely, 2^181830457 is an apocalyptic number.

It is an amenable number.

181830457 is a deficient number, since it is larger than the sum of its proper divisors (1).

181830457 is an equidigital number, since it uses as much as digits as its factorization.

181830457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 181830457 is about 13484.4524175066. The cubic root of 181830457 is about 566.5290838227.

The spelling of 181830457 in words is "one hundred eighty-one million, eight hundred thirty thousand, four hundred fifty-seven".