163611473 has 2 divisors, whose sum is σ = 163611474. Its totient is φ = 163611472.

The previous prime is 163611467. The next prime is 163611491. The reversal of 163611473 is 374116361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82755409 + 80856064 = 9097^2 + 8992^2 .

It is a cyclic number.

It is not a de Polignac number, because 163611473 - 2²² = 159417169 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (163616473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81805736 + 81805737.

It is an arithmetic number, because the mean of its divisors is an integer number (81805737).

Almost surely, 2^163611473 is an apocalyptic number.

It is an amenable number.

163611473 is a deficient number, since it is larger than the sum of its proper divisors (1).

163611473 is an equidigital number, since it uses as much as digits as its factorization.

163611473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 32.

The square root of 163611473 is about 12791.0700490616. The cubic root of 163611473 is about 546.9377733134.

The spelling of 163611473 in words is "one hundred sixty-three million, six hundred eleven thousand, four hundred seventy-three".