161685483 has 4 divisors (see below), whose sum is σ = 215580648. Its totient is φ = 107790320.

The previous prime is 161685473. The next prime is 161685551. The reversal of 161685483 is 384586161.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 161685483 - 2⁵ = 161685451 is a prime.

It is a super-2 number, since 2×161685483² = 52284390825886578, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161685463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26947578 + ... + 26947583.

It is an arithmetic number, because the mean of its divisors is an integer number (53895162).

Almost surely, 2^161685483 is an apocalyptic number.

161685483 is a deficient number, since it is larger than the sum of its proper divisors (53895165).

161685483 is an equidigital number, since it uses as much as digits as its factorization.

161685483 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53895164.

The product of its digits is 138240, while the sum is 42.

The square root of 161685483 is about 12715.5606640053. The cubic root of 161685483 is about 544.7831620623.

The spelling of 161685483 in words is "one hundred sixty-one million, six hundred eighty-five thousand, four hundred eighty-three".