169121429 has 2 divisors, whose sum is σ = 169121430. Its totient is φ = 169121428.

The previous prime is 169121411. The next prime is 169121441. The reversal of 169121429 is 924121961.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 117137329 + 51984100 = 10823^2 + 7210^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-169121429 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 (169121479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84560714 + 84560715.

It is an arithmetic number, because the mean of its divisors is an integer number (84560715).

Almost surely, 2^169121429 is an apocalyptic number.

It is an amenable number.

169121429 is a deficient number, since it is larger than the sum of its proper divisors (1).

169121429 is an equidigital number, since it uses as much as digits as its factorization.

169121429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 35.

The square root of 169121429 is about 13004.6695075269. The cubic root of 169121429 is about 553.0098665491.

The spelling of 169121429 in words is "one hundred sixty-nine million, one hundred twenty-one thousand, four hundred twenty-nine".