169431943 has 2 divisors, whose sum is σ = 169431944. Its totient is φ = 169431942.

The previous prime is 169431929. The next prime is 169431947. The reversal of 169431943 is 349134961.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-169431943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 169431896 and 169431905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (169431947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84715971 + 84715972.

It is an arithmetic number, because the mean of its divisors is an integer number (84715972).

Almost surely, 2^169431943 is an apocalyptic number.

169431943 is a deficient number, since it is larger than the sum of its proper divisors (1).

169431943 is an equidigital number, since it uses as much as digits as its factorization.

169431943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 40.

The square root of 169431943 is about 13016.6025905380. The cubic root of 169431943 is about 553.3481093537.

The spelling of 169431943 in words is "one hundred sixty-nine million, four hundred thirty-one thousand, nine hundred forty-three".