161344493 has 2 divisors, whose sum is σ = 161344494. Its totient is φ = 161344492.

The previous prime is 161344481. The next prime is 161344511. The reversal of 161344493 is 394443161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 154306084 + 7038409 = 12422^2 + 2653^2 .

It is a cyclic number.

It is not a de Polignac number, because 161344493 - 2⁸ = 161344237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161344423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80672246 + 80672247.

It is an arithmetic number, because the mean of its divisors is an integer number (80672247).

Almost surely, 2^161344493 is an apocalyptic number.

It is an amenable number.

161344493 is a deficient number, since it is larger than the sum of its proper divisors (1).

161344493 is an equidigital number, since it uses as much as digits as its factorization.

161344493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 35.

The square root of 161344493 is about 12702.1452125222. The cubic root of 161344493 is about 544.3999152145.

The spelling of 161344493 in words is "one hundred sixty-one million, three hundred forty-four thousand, four hundred ninety-three".