168992471 has 2 divisors, whose sum is σ = 168992472. Its totient is φ = 168992470.

The previous prime is 168992443. The next prime is 168992503. The reversal of 168992471 is 174299861.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-168992471 is a prime.

It is a super-3 number, since 3×168992471³ (a number of 26 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168992071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84496235 + 84496236.

It is an arithmetic number, because the mean of its divisors is an integer number (84496236).

Almost surely, 2^168992471 is an apocalyptic number.

168992471 is a deficient number, since it is larger than the sum of its proper divisors (1).

168992471 is an equidigital number, since it uses as much as digits as its factorization.

168992471 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 47.

The square root of 168992471 is about 12999.7104198517. The cubic root of 168992471 is about 552.8692709608.

The spelling of 168992471 in words is "one hundred sixty-eight million, nine hundred ninety-two thousand, four hundred seventy-one".