161717383 has 2 divisors, whose sum is σ = 161717384. Its totient is φ = 161717382.

The previous prime is 161717357. The next prime is 161717399. The reversal of 161717383 is 383717161.

It is a happy number.

161717383 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (383717161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161717383 - 2¹⁷ = 161586311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161717323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80858691 + 80858692.

It is an arithmetic number, because the mean of its divisors is an integer number (80858692).

Almost surely, 2^161717383 is an apocalyptic number.

161717383 is a deficient number, since it is larger than the sum of its proper divisors (1).

161717383 is an equidigital number, since it uses as much as digits as its factorization.

161717383 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21168, while the sum is 37.

The square root of 161717383 is about 12716.8149707385. The cubic root of 161717383 is about 544.8189876659.

The spelling of 161717383 in words is "one hundred sixty-one million, seven hundred seventeen thousand, three hundred eighty-three".