161459801 has 2 divisors, whose sum is σ = 161459802. Its totient is φ = 161459800.

The previous prime is 161459789. The next prime is 161459803. The reversal of 161459801 is 108954161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 161315401 + 144400 = 12701^2 + 380^2 .

It is an emirp because it is prime and its reverse (108954161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161459801 - 2¹⁰ = 161458777 is a prime.

It is a Sophie Germain prime.

Together with 161459803, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (161459803) 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, 80729900 + 80729901.

It is an arithmetic number, because the mean of its divisors is an integer number (80729901).

Almost surely, 2^161459801 is an apocalyptic number.

It is an amenable number.

161459801 is a deficient number, since it is larger than the sum of its proper divisors (1).

161459801 is an equidigital number, since it uses as much as digits as its factorization.

161459801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 35.

The square root of 161459801 is about 12706.6833202059. The cubic root of 161459801 is about 544.5295730169.

The spelling of 161459801 in words is "one hundred sixty-one million, four hundred fifty-nine thousand, eight hundred one".