161681483 has 4 divisors (see below), whose sum is σ = 162122400. Its totient is φ = 161240568.

The previous prime is 161681477. The next prime is 161681497. The reversal of 161681483 is 384186161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 384186161 = 1123 ⋅342107.

It is a cyclic number.

It is not a de Polignac number, because 161681483 - 2¹² = 161677387 is a prime.

It is a super-2 number, since 2×161681483² = 52281803890158578, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161681183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 219908 + ... + 220641.

It is an arithmetic number, because the mean of its divisors is an integer number (40530600).

Almost surely, 2^161681483 is an apocalyptic number.

161681483 is a deficient number, since it is larger than the sum of its proper divisors (440917).

161681483 is an equidigital number, since it uses as much as digits as its factorization.

161681483 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440916.

The product of its digits is 27648, while the sum is 38.

The square root of 161681483 is about 12715.4033754341. The cubic root of 161681483 is about 544.7786694911.

The spelling of 161681483 in words is "one hundred sixty-one million, six hundred eighty-one thousand, four hundred eighty-three".