161492543 has 2 divisors, whose sum is σ = 161492544. Its totient is φ = 161492542.

The previous prime is 161492489. The next prime is 161492581. The reversal of 161492543 is 345294161.

161492543 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 is a cyclic number.

It is not a de Polignac number, because 161492543 - 2⁶ = 161492479 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161492143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80746271 + 80746272.

It is an arithmetic number, because the mean of its divisors is an integer number (80746272).

Almost surely, 2^161492543 is an apocalyptic number.

161492543 is a deficient number, since it is larger than the sum of its proper divisors (1).

161492543 is an equidigital number, since it uses as much as digits as its factorization.

161492543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 35.

The square root of 161492543 is about 12707.9716320111. The cubic root of 161492543 is about 544.5663784264.

The spelling of 161492543 in words is "one hundred sixty-one million, four hundred ninety-two thousand, five hundred forty-three".