166739429 has 2 divisors, whose sum is σ = 166739430. Its totient is φ = 166739428.

The previous prime is 166739401. The next prime is 166739467. The reversal of 166739429 is 924937661.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 148888804 + 17850625 = 12202^2 + 4225^2 .

It is a cyclic number.

It is not a de Polignac number, because 166739429 - 2²⁰ = 165690853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166739929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83369714 + 83369715.

It is an arithmetic number, because the mean of its divisors is an integer number (83369715).

Almost surely, 2^166739429 is an apocalyptic number.

It is an amenable number.

166739429 is a deficient number, since it is larger than the sum of its proper divisors (1).

166739429 is an equidigital number, since it uses as much as digits as its factorization.

166739429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 489888, while the sum is 47.

The square root of 166739429 is about 12912.7622529031. The cubic root of 166739429 is about 550.4012818079.

The spelling of 166739429 in words is "one hundred sixty-six million, seven hundred thirty-nine thousand, four hundred twenty-nine".