163580401 has 2 divisors, whose sum is σ = 163580402. Its totient is φ = 163580400.

The previous prime is 163580399. The next prime is 163580407. The reversal of 163580401 is 104085361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 150038001 + 13542400 = 12249^2 + 3680^2 .

It is a cyclic number.

It is not a de Polignac number, because 163580401 - 2¹ = 163580399 is a prime.

Together with 163580399, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 163580401.

It is not a weakly prime, because it can be changed into another prime (163580407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81790200 + 81790201.

It is an arithmetic number, because the mean of its divisors is an integer number (81790201).

Almost surely, 2^163580401 is an apocalyptic number.

It is an amenable number.

163580401 is a deficient number, since it is larger than the sum of its proper divisors (1).

163580401 is an equidigital number, since it uses as much as digits as its factorization.

163580401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 163580401 is about 12789.8553940222. The cubic root of 163580401 is about 546.9031475297.

The spelling of 163580401 in words is "one hundred sixty-three million, five hundred eighty thousand, four hundred one".