38123734009 has 3 divisors (see below), whose sum is σ = 38123929263. Its totient is φ = 38123538756.

The previous prime is 38123733983. The next prime is 38123734021. The reversal of 38123734009 is 90043732183.

The square root of 38123734009 is 195253.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 90043732183 = 47 ⋅1915824089.

It can be written as a sum of positive squares in only one way, i.e., 12915186025 + 25208547984 = 113645^2 + 158772^2 .

It is not a de Polignac number, because 38123734009 - 2¹⁵ = 38123701241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38123734039) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 97627 + ... + 292879.

It is an arithmetic number, because the mean of its divisors is an integer number (12707976421).

Almost surely, 2^38123734009 is an apocalyptic number.

38123734009 is the 195253-rd square number.

38123734009 is the 97627-th centered octagonal number.

It is an amenable number.

38123734009 is a deficient number, since it is larger than the sum of its proper divisors (195254).

38123734009 is an frugal number, since it uses more digits than its factorization.

38123734009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390506 (or 195253 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 40.

The spelling of 38123734009 in words is "thirty-eight billion, one hundred twenty-three million, seven hundred thirty-four thousand, nine".