1980400223 has 4 divisors (see below), whose sum is σ = 2000008248. Its totient is φ = 1960792200.

The previous prime is 1980400207. The next prime is 1980400243. The reversal of 1980400223 is 3220040891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3220040891 = 743 ⋅4333837.

It is a cyclic number.

It is not a de Polignac number, because 1980400223 - 2⁴ = 1980400207 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 (1980400243) 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, 9803861 + ... + 9804062.

It is an arithmetic number, because the mean of its divisors is an integer number (500002062).

Almost surely, 2^1980400223 is an apocalyptic number.

1980400223 is a deficient number, since it is larger than the sum of its proper divisors (19608025).

1980400223 is a wasteful number, since it uses less digits than its factorization.

1980400223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19608024.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 1980400223 is about 44501.6878668664. The cubic root of 1980400223 is about 1255.7918364956.

The spelling of 1980400223 in words is "one billion, nine hundred eighty million, four hundred thousand, two hundred twenty-three".