161023583 has 4 divisors (see below), whose sum is σ = 184026960. Its totient is φ = 138020208.

The previous prime is 161023559. The next prime is 161023627. The reversal of 161023583 is 385320161.

161023583 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 385320161 = 107 ⋅3601123.

It is a cyclic number.

It is not a de Polignac number, because 161023583 - 2¹⁶ = 160958047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161023543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11501678 + ... + 11501691.

It is an arithmetic number, because the mean of its divisors is an integer number (46006740).

Almost surely, 2^161023583 is an apocalyptic number.

161023583 is a deficient number, since it is larger than the sum of its proper divisors (23003377).

161023583 is an equidigital number, since it uses as much as digits as its factorization.

161023583 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23003376.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 161023583 is about 12689.5068068070. The cubic root of 161023583 is about 544.0387432308.

The spelling of 161023583 in words is "one hundred sixty-one million, twenty-three thousand, five hundred eighty-three".