166319429 has 2 divisors, whose sum is σ = 166319430. Its totient is φ = 166319428.

The previous prime is 166319339. The next prime is 166319443. The reversal of 166319429 is 924913661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 148888804 + 17430625 = 12202^2 + 4175^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166319429 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166319479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83159714 + 83159715.

It is an arithmetic number, because the mean of its divisors is an integer number (83159715).

Almost surely, 2^166319429 is an apocalyptic number.

It is an amenable number.

166319429 is a deficient number, since it is larger than the sum of its proper divisors (1).

166319429 is an equidigital number, since it uses as much as digits as its factorization.

166319429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 41.

The square root of 166319429 is about 12896.4890183336. The cubic root of 166319429 is about 549.9387579193.

The spelling of 166319429 in words is "one hundred sixty-six million, three hundred nineteen thousand, four hundred twenty-nine".