181141663 has 2 divisors, whose sum is σ = 181141664. Its totient is φ = 181141662.

The previous prime is 181141643. The next prime is 181141673. The reversal of 181141663 is 366141181.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-181141663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (181141643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90570831 + 90570832.

It is an arithmetic number, because the mean of its divisors is an integer number (90570832).

Almost surely, 2^181141663 is an apocalyptic number.

181141663 is a deficient number, since it is larger than the sum of its proper divisors (1).

181141663 is an equidigital number, since it uses as much as digits as its factorization.

181141663 is an evil number, because the sum of its binary digits is even.

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

The square root of 181141663 is about 13458.8878812478. The cubic root of 181141663 is about 565.8128202323.

The spelling of 181141663 in words is "one hundred eighty-one million, one hundred forty-one thousand, six hundred sixty-three".