8138323733 has 4 divisors (see below), whose sum is σ = 8157747360. Its totient is φ = 8118900108.

The previous prime is 8138323729. The next prime is 8138323747. The reversal of 8138323733 is 3373238318.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8138323733 - 2² = 8138323729 is a prime.

It is a super-2 number, since 2×8138323733² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8138323033) 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, 9711185 + ... + 9712022.

It is an arithmetic number, because the mean of its divisors is an integer number (2039436840).

Almost surely, 2^8138323733 is an apocalyptic number.

It is an amenable number.

8138323733 is a deficient number, since it is larger than the sum of its proper divisors (19423627).

8138323733 is a wasteful number, since it uses less digits than its factorization.

8138323733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19423626.

The product of its digits is 217728, while the sum is 41.

The square root of 8138323733 is about 90212.6583856168. The cubic root of 8138323733 is about 2011.4611730460.

The spelling of 8138323733 in words is "eight billion, one hundred thirty-eight million, three hundred twenty-three thousand, seven hundred thirty-three".