168472429 has 2 divisors, whose sum is σ = 168472430. Its totient is φ = 168472428.

The previous prime is 168472391. The next prime is 168472441. The reversal of 168472429 is 924274861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120890025 + 47582404 = 10995^2 + 6898^2 .

It is an emirp because it is prime and its reverse (924274861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 168472429 - 2¹¹ = 168470381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168472459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84236214 + 84236215.

It is an arithmetic number, because the mean of its divisors is an integer number (84236215).

Almost surely, 2^168472429 is an apocalyptic number.

It is an amenable number.

168472429 is a deficient number, since it is larger than the sum of its proper divisors (1).

168472429 is an equidigital number, since it uses as much as digits as its factorization.

168472429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 193536, while the sum is 43.

The square root of 168472429 is about 12979.6929470616. The cubic root of 168472429 is about 552.3015717623.

The spelling of 168472429 in words is "one hundred sixty-eight million, four hundred seventy-two thousand, four hundred twenty-nine".