161872883 has 4 divisors (see below), whose sum is σ = 161899440. Its totient is φ = 161846328.

The previous prime is 161872877. The next prime is 161872897. The reversal of 161872883 is 388278161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 388278161 = 14533 ⋅26717.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161872883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161872853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 941 + ... + 18017.

It is an arithmetic number, because the mean of its divisors is an integer number (40474860).

Almost surely, 2^161872883 is an apocalyptic number.

161872883 is a deficient number, since it is larger than the sum of its proper divisors (26557).

161872883 is an equidigital number, since it uses as much as digits as its factorization.

161872883 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26556.

The product of its digits is 129024, while the sum is 44.

The square root of 161872883 is about 12722.9274540099. The cubic root of 161872883 is about 544.9935560218.

The spelling of 161872883 in words is "one hundred sixty-one million, eight hundred seventy-two thousand, eight hundred eighty-three".