161847029 has 2 divisors, whose sum is σ = 161847030. Its totient is φ = 161847028.

The previous prime is 161847019. The next prime is 161847031. The reversal of 161847029 is 920748161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 160402225 + 1444804 = 12665^2 + 1202^2 .

It is a cyclic number.

It is not a de Polignac number, because 161847029 - 2²⁰ = 160798453 is a prime.

It is a super-2 number, since 2×161847029² = 52388921592253682, which contains 22 as substring.

Together with 161847031, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 161846983 and 161847001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161847019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80923514 + 80923515.

It is an arithmetic number, because the mean of its divisors is an integer number (80923515).

Almost surely, 2^161847029 is an apocalyptic number.

It is an amenable number.

161847029 is a deficient number, since it is larger than the sum of its proper divisors (1).

161847029 is an equidigital number, since it uses as much as digits as its factorization.

161847029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 161847029 is about 12721.9113736891. The cubic root of 161847029 is about 544.9645393980.

The spelling of 161847029 in words is "one hundred sixty-one million, eight hundred forty-seven thousand, twenty-nine".