161346481 has 2 divisors, whose sum is σ = 161346482. Its totient is φ = 161346480.

The previous prime is 161346463. The next prime is 161346491. The reversal of 161346481 is 184643161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84345856 + 77000625 = 9184^2 + 8775^2 .

It is a cyclic number.

It is not a de Polignac number, because 161346481 - 2⁹ = 161345969 is a prime.

It is a super-2 number, since 2×161346481² = 52065373862166722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (161346431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80673240 + 80673241.

It is an arithmetic number, because the mean of its divisors is an integer number (80673241).

Almost surely, 2^161346481 is an apocalyptic number.

It is an amenable number.

161346481 is a deficient number, since it is larger than the sum of its proper divisors (1).

161346481 is an equidigital number, since it uses as much as digits as its factorization.

161346481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 34.

The square root of 161346481 is about 12702.2234667793. The cubic root of 161346481 is about 544.4021511395.

The spelling of 161346481 in words is "one hundred sixty-one million, three hundred forty-six thousand, four hundred eighty-one".