8273913813 has 18 divisors (see below), whose sum is σ = 13136454422. Its totient is φ = 5014492560.

The previous prime is 8273913797. The next prime is 8273913833. The reversal of 8273913813 is 3183193728.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 5891790564 + 2382123249 = 76758^2 + 48807^2 .

It is not a de Polignac number, because 8273913813 - 2⁴ = 8273913797 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 (8273913833) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3797770 + ... + 3799947.

Almost surely, 2^8273913813 is an apocalyptic number.

It is an amenable number.

8273913813 is a deficient number, since it is larger than the sum of its proper divisors (4862540609).

8273913813 is a wasteful number, since it uses less digits than its factorization.

8273913813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7597745 (or 7597731 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 8273913813 is about 90961.0565736788. The cubic root of 8273913813 is about 2022.5704796409.

The spelling of 8273913813 in words is "eight billion, two hundred seventy-three million, nine hundred thirteen thousand, eight hundred thirteen".