38381113 has 2 divisors, whose sum is σ = 38381114. Its totient is φ = 38381112.

The previous prime is 38381107. The next prime is 38381117. The reversal of 38381113 is 31118383.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37601424 + 779689 = 6132^2 + 883^2 .

It is a cyclic number.

It is not a de Polignac number, because 38381113 - 2⁵ = 38381081 is a prime.

It is not a weakly prime, because it can be changed into another prime (38381117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19190556 + 19190557.

It is an arithmetic number, because the mean of its divisors is an integer number (19190557).

Almost surely, 2^38381113 is an apocalyptic number.

38381113 is the 3312-nd centered heptagonal number.

It is an amenable number.

38381113 is a deficient number, since it is larger than the sum of its proper divisors (1).

38381113 is an equidigital number, since it uses as much as digits as its factorization.

38381113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 28.

The square root of 38381113 is about 6195.2492282393. The cubic root of 38381113 is about 337.3177448528.

Adding to 38381113 its reverse (31118383), we get a palindrome (69499496).

The spelling of 38381113 in words is "thirty-eight million, three hundred eighty-one thousand, one hundred thirteen".