161732801 has 2 divisors, whose sum is σ = 161732802. Its totient is φ = 161732800.

The previous prime is 161732789. The next prime is 161732833. The reversal of 161732801 is 108237161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 103225600 + 58507201 = 10160^2 + 7649^2 .

It is a cyclic number.

It is not a de Polignac number, because 161732801 - 2⁶ = 161732737 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is equal to p_9066170 and since 161732801 and 9066170 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (161732881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80866400 + 80866401.

It is an arithmetic number, because the mean of its divisors is an integer number (80866401).

Almost surely, 2^161732801 is an apocalyptic number.

It is an amenable number.

161732801 is a deficient number, since it is larger than the sum of its proper divisors (1).

161732801 is an equidigital number, since it uses as much as digits as its factorization.

161732801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 161732801 is about 12717.4211615406. The cubic root of 161732801 is about 544.8363013112.

Adding to 161732801 its reverse (108237161), we get a palindrome (269969962).

The spelling of 161732801 in words is "one hundred sixty-one million, seven hundred thirty-two thousand, eight hundred one".