163939417 has 2 divisors, whose sum is σ = 163939418. Its totient is φ = 163939416.

The previous prime is 163939367. The next prime is 163939453. The reversal of 163939417 is 714939361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 103550976 + 60388441 = 10176^2 + 7771^2 .

It is a cyclic number.

It is not a de Polignac number, because 163939417 - 2⁷ = 163939289 is a prime.

It is a super-2 number, since 2×163939417² = 53752264892599778, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (163939487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81969708 + 81969709.

It is an arithmetic number, because the mean of its divisors is an integer number (81969709).

Almost surely, 2^163939417 is an apocalyptic number.

It is an amenable number.

163939417 is a deficient number, since it is larger than the sum of its proper divisors (1).

163939417 is an equidigital number, since it uses as much as digits as its factorization.

163939417 is an evil number, because the sum of its binary digits is even.

The product of its digits is 122472, while the sum is 43.

The square root of 163939417 is about 12803.8828876244. The cubic root of 163939417 is about 547.3029580832.

The spelling of 163939417 in words is "one hundred sixty-three million, nine hundred thirty-nine thousand, four hundred seventeen".