169021427 has 2 divisors, whose sum is σ = 169021428. Its totient is φ = 169021426.

The previous prime is 169021417. The next prime is 169021451. The reversal of 169021427 is 724120961.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (724120961) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 169021427 - 2²⁰ = 167972851 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 169021393 and 169021402.

It is not a weakly prime, because it can be changed into another prime (169021417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84510713 + 84510714.

It is an arithmetic number, because the mean of its divisors is an integer number (84510714).

Almost surely, 2^169021427 is an apocalyptic number.

169021427 is a deficient number, since it is larger than the sum of its proper divisors (1).

169021427 is an equidigital number, since it uses as much as digits as its factorization.

169021427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 169021427 is about 13000.8240892645. The cubic root of 169021427 is about 552.9008462696.

The spelling of 169021427 in words is "one hundred sixty-nine million, twenty-one thousand, four hundred twenty-seven".