165117427 has 2 divisors, whose sum is σ = 165117428. Its totient is φ = 165117426.

The previous prime is 165117397. The next prime is 165117457. The reversal of 165117427 is 724711561.

It is a balanced prime because it is at equal distance from previous prime (165117397) and next prime (165117457).

It is a cyclic number.

It is not a de Polignac number, because 165117427 - 2¹⁹ = 164593139 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 165117392 and 165117401.

It is not a weakly prime, because it can be changed into another prime (165117457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82558713 + 82558714.

It is an arithmetic number, because the mean of its divisors is an integer number (82558714).

Almost surely, 2^165117427 is an apocalyptic number.

165117427 is a deficient number, since it is larger than the sum of its proper divisors (1).

165117427 is an equidigital number, since it uses as much as digits as its factorization.

165117427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11760, while the sum is 34.

The square root of 165117427 is about 12849.8026054878. The cubic root of 165117427 is about 548.6107384050.

Adding to 165117427 its reverse (724711561), we get a palindrome (889828988).

The spelling of 165117427 in words is "one hundred sixty-five million, one hundred seventeen thousand, four hundred twenty-seven".