161278679 has 2 divisors, whose sum is σ = 161278680. Its totient is φ = 161278678.

The previous prime is 161278673. The next prime is 161278703. The reversal of 161278679 is 976872161.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161278679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161278673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80639339 + 80639340.

It is an arithmetic number, because the mean of its divisors is an integer number (80639340).

Almost surely, 2^161278679 is an apocalyptic number.

161278679 is a deficient number, since it is larger than the sum of its proper divisors (1).

161278679 is an equidigital number, since it uses as much as digits as its factorization.

161278679 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 254016, while the sum is 47.

The square root of 161278679 is about 12699.5542835172. The cubic root of 161278679 is about 544.3258831271.

The spelling of 161278679 in words is "one hundred sixty-one million, two hundred seventy-eight thousand, six hundred seventy-nine".