161347247 has 2 divisors, whose sum is σ = 161347248. Its totient is φ = 161347246.

The previous prime is 161347243. The next prime is 161347253. The reversal of 161347247 is 742743161.

It is a weak prime.

It is an emirp because it is prime and its reverse (742743161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161347247 - 2² = 161347243 is a prime.

It is a super-2 number, since 2×161347247² = 52065868228958018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161347243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80673623 + 80673624.

It is an arithmetic number, because the mean of its divisors is an integer number (80673624).

Almost surely, 2^161347247 is an apocalyptic number.

161347247 is a deficient number, since it is larger than the sum of its proper divisors (1).

161347247 is an equidigital number, since it uses as much as digits as its factorization.

161347247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28224, while the sum is 35.

The square root of 161347247 is about 12702.2536189449. The cubic root of 161347247 is about 544.4030126631.

The spelling of 161347247 in words is "one hundred sixty-one million, three hundred forty-seven thousand, two hundred forty-seven".