1620023233 has 4 divisors (see below), whose sum is σ = 1623984580. Its totient is φ = 1616061888.

The previous prime is 1620023231. The next prime is 1620023263. The reversal of 1620023233 is 3323200261.

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 803892609 + 816130624 = 28353^2 + 28568^2 .

It is a cyclic number.

It is not a de Polignac number, because 1620023233 - 2¹ = 1620023231 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1620023231) 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, 1980060 + ... + 1980877.

It is an arithmetic number, because the mean of its divisors is an integer number (405996145).

Almost surely, 2^1620023233 is an apocalyptic number.

It is an amenable number.

1620023233 is a deficient number, since it is larger than the sum of its proper divisors (3961347).

1620023233 is an equidigital number, since it uses as much as digits as its factorization.

1620023233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3961346.

The product of its (nonzero) digits is 1296, while the sum is 22.

The square root of 1620023233 is about 40249.5122082243. The cubic root of 1620023233 is about 1174.4659067757.

Adding to 1620023233 its reverse (3323200261), we get a palindrome (4943223494).

The spelling of 1620023233 in words is "one billion, six hundred twenty million, twenty-three thousand, two hundred thirty-three".