1204023213 has 6 divisors (see below), whose sum is σ = 1739144654. Its totient is φ = 802682136.

The previous prime is 1204023203. The next prime is 1204023241. The reversal of 1204023213 is 3123204021.

It can be written as a sum of positive squares in only one way, i.e., 989605764 + 214417449 = 31458^2 + 14643^2 .

It is not a de Polignac number, because 1204023213 - 2²⁰ = 1202974637 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 (1204023203) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 66890170 + ... + 66890187.

Almost surely, 2^1204023213 is an apocalyptic number.

It is an amenable number.

1204023213 is a deficient number, since it is larger than the sum of its proper divisors (535121441).

1204023213 is a wasteful number, since it uses less digits than its factorization.

1204023213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133780363 (or 133780360 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1204023213 is about 34699.0376379519. The cubic root of 1204023213 is about 1063.8448282790.

Adding to 1204023213 its reverse (3123204021), we get a palindrome (4327227234).

It can be divided in two parts, 12040 and 23213, that added together give a palindrome (35253).

The spelling of 1204023213 in words is "one billion, two hundred four million, twenty-three thousand, two hundred thirteen".