169642423 has 2 divisors, whose sum is σ = 169642424. Its totient is φ = 169642422.

The previous prime is 169642399. The next prime is 169642463. The reversal of 169642423 is 324246961.

It is a happy number.

169642423 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-169642423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (169642463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84821211 + 84821212.

It is an arithmetic number, because the mean of its divisors is an integer number (84821212).

Almost surely, 2^169642423 is an apocalyptic number.

169642423 is a deficient number, since it is larger than the sum of its proper divisors (1).

169642423 is an equidigital number, since it uses as much as digits as its factorization.

169642423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 37.

The square root of 169642423 is about 13024.6851401483. The cubic root of 169642423 is about 553.5771502157.

The spelling of 169642423 in words is "one hundred sixty-nine million, six hundred forty-two thousand, four hundred twenty-three".