161366279 has 2 divisors, whose sum is σ = 161366280. Its totient is φ = 161366278.

The previous prime is 161366267. The next prime is 161366299. The reversal of 161366279 is 972663161.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161366279 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161366299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80683139 + 80683140.

It is an arithmetic number, because the mean of its divisors is an integer number (80683140).

Almost surely, 2^161366279 is an apocalyptic number.

161366279 is a deficient number, since it is larger than the sum of its proper divisors (1).

161366279 is an equidigital number, since it uses as much as digits as its factorization.

161366279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 41.

The square root of 161366279 is about 12703.0027552544. The cubic root of 161366279 is about 544.4244171617.

The spelling of 161366279 in words is "one hundred sixty-one million, three hundred sixty-six thousand, two hundred seventy-nine".