161912347 has 2 divisors, whose sum is σ = 161912348. Its totient is φ = 161912346.

The previous prime is 161912299. The next prime is 161912353. The reversal of 161912347 is 743219161.

161912347 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (743219161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161912347 - 2²³ = 153523739 is a prime.

It is a super-2 number, since 2×161912347² = 52431216222096818, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (161912747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80956173 + 80956174.

It is an arithmetic number, because the mean of its divisors is an integer number (80956174).

Almost surely, 2^161912347 is an apocalyptic number.

161912347 is a deficient number, since it is larger than the sum of its proper divisors (1).

161912347 is an equidigital number, since it uses as much as digits as its factorization.

161912347 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 34.

The square root of 161912347 is about 12724.4782604239. The cubic root of 161912347 is about 545.0378415494.

The spelling of 161912347 in words is "one hundred sixty-one million, nine hundred twelve thousand, three hundred forty-seven".