161234849 has 2 divisors, whose sum is σ = 161234850. Its totient is φ = 161234848.

The previous prime is 161234833. The next prime is 161234891. The reversal of 161234849 is 948432161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 161163025 + 71824 = 12695^2 + 268^2 .

It is an emirp because it is prime and its reverse (948432161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161234849 - 2⁴ = 161234833 is a prime.

It is not a weakly prime, because it can be changed into another prime (161234819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80617424 + 80617425.

It is an arithmetic number, because the mean of its divisors is an integer number (80617425).

Almost surely, 2^161234849 is an apocalyptic number.

It is an amenable number.

161234849 is a deficient number, since it is larger than the sum of its proper divisors (1).

161234849 is an equidigital number, since it uses as much as digits as its factorization.

161234849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41472, while the sum is 38.

The square root of 161234849 is about 12697.8285151438. The cubic root of 161234849 is about 544.2765689727.

The spelling of 161234849 in words is "one hundred sixty-one million, two hundred thirty-four thousand, eight hundred forty-nine".