1601866873 has 4 divisors (see below), whose sum is σ = 1602041188. Its totient is φ = 1601692560.

The previous prime is 1601866867. The next prime is 1601866891. The reversal of 1601866873 is 3786681061.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1046651904 + 555214969 = 32352^2 + 23563^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1601866873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1601866853) 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, 72558 + ... + 92023.

It is an arithmetic number, because the mean of its divisors is an integer number (400510297).

Almost surely, 2^1601866873 is an apocalyptic number.

It is an amenable number.

1601866873 is a deficient number, since it is larger than the sum of its proper divisors (174315).

1601866873 is an equidigital number, since it uses as much as digits as its factorization.

1601866873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174314.

The product of its (nonzero) digits is 290304, while the sum is 46.

The square root of 1601866873 is about 40023.3291094082. The cubic root of 1601866873 is about 1170.0618159562.

The spelling of 1601866873 in words is "one billion, six hundred one million, eight hundred sixty-six thousand, eight hundred seventy-three".