163394317 has 2 divisors, whose sum is σ = 163394318. Its totient is φ = 163394316.

The previous prime is 163394291. The next prime is 163394333. The reversal of 163394317 is 713493361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 159289641 + 4104676 = 12621^2 + 2026^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-163394317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (163394347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81697158 + 81697159.

It is an arithmetic number, because the mean of its divisors is an integer number (81697159).

Almost surely, 2^163394317 is an apocalyptic number.

It is an amenable number.

163394317 is a deficient number, since it is larger than the sum of its proper divisors (1).

163394317 is an equidigital number, since it uses as much as digits as its factorization.

163394317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40824, while the sum is 37.

The square root of 163394317 is about 12782.5786522125. The cubic root of 163394317 is about 546.6956888138.

The spelling of 163394317 in words is "one hundred sixty-three million, three hundred ninety-four thousand, three hundred seventeen".