161323427 has 2 divisors, whose sum is σ = 161323428. Its totient is φ = 161323426.

The previous prime is 161323373. The next prime is 161323429. The reversal of 161323427 is 724323161.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 161323427 - 2¹² = 161319331 is a prime.

Together with 161323429, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 161323427.

It is not a weakly prime, because it can be changed into another prime (161323429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80661713 + 80661714.

It is an arithmetic number, because the mean of its divisors is an integer number (80661714).

Almost surely, 2^161323427 is an apocalyptic number.

161323427 is a deficient number, since it is larger than the sum of its proper divisors (1).

161323427 is an equidigital number, since it uses as much as digits as its factorization.

161323427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048, while the sum is 29.

The square root of 161323427 is about 12701.3159554434. The cubic root of 161323427 is about 544.3762209283.

Adding to 161323427 its reverse (724323161), we get a palindrome (885646588).

The spelling of 161323427 in words is "one hundred sixty-one million, three hundred twenty-three thousand, four hundred twenty-seven".