163964417 has 2 divisors, whose sum is σ = 163964418. Its totient is φ = 163964416.

The previous prime is 163964393. The next prime is 163964443. The reversal of 163964417 is 714469361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 144744961 + 19219456 = 12031^2 + 4384^2 .

It is a cyclic number.

It is not a de Polignac number, because 163964417 - 2²² = 159770113 is a prime.

It is not a weakly prime, because it can be changed into another prime (163964467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81982208 + 81982209.

It is an arithmetic number, because the mean of its divisors is an integer number (81982209).

Almost surely, 2^163964417 is an apocalyptic number.

It is an amenable number.

163964417 is a deficient number, since it is larger than the sum of its proper divisors (1).

163964417 is an equidigital number, since it uses as much as digits as its factorization.

163964417 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 41.

The square root of 163964417 is about 12804.8591167572. The cubic root of 163964417 is about 547.3307770559.

The spelling of 163964417 in words is "one hundred sixty-three million, nine hundred sixty-four thousand, four hundred seventeen".