161171279 has 2 divisors, whose sum is σ = 161171280. Its totient is φ = 161171278.

The previous prime is 161171249. The next prime is 161171293. The reversal of 161171279 is 972171161.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161171279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161171239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80585639 + 80585640.

It is an arithmetic number, because the mean of its divisors is an integer number (80585640).

Almost surely, 2^161171279 is an apocalyptic number.

161171279 is a deficient number, since it is larger than the sum of its proper divisors (1).

161171279 is an equidigital number, since it uses as much as digits as its factorization.

161171279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5292, while the sum is 35.

The square root of 161171279 is about 12695.3250844553. The cubic root of 161171279 is about 544.2050290008.

The spelling of 161171279 in words is "one hundred sixty-one million, one hundred seventy-one thousand, two hundred seventy-nine".