161482861 has 2 divisors, whose sum is σ = 161482862. Its totient is φ = 161482860.

The previous prime is 161482819. The next prime is 161482879. The reversal of 161482861 is 168284161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 113955625 + 47527236 = 10675^2 + 6894^2 .

It is an emirp because it is prime and its reverse (168284161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161482861 - 2¹³ = 161474669 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 161482861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161482801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80741430 + 80741431.

It is an arithmetic number, because the mean of its divisors is an integer number (80741431).

Almost surely, 2^161482861 is an apocalyptic number.

It is an amenable number.

161482861 is a deficient number, since it is larger than the sum of its proper divisors (1).

161482861 is an equidigital number, since it uses as much as digits as its factorization.

161482861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18432, while the sum is 37.

The square root of 161482861 is about 12707.5906843115. The cubic root of 161482861 is about 544.5554953706. Note that the first 3 decimals are identical.

The spelling of 161482861 in words is "one hundred sixty-one million, four hundred eighty-two thousand, eight hundred sixty-one".