38813791 has 2 divisors, whose sum is σ = 38813792. Its totient is φ = 38813790.

The previous prime is 38813779. The next prime is 38813833. The reversal of 38813791 is 19731883.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 38813791 - 2¹⁷ = 38682719 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38813491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19406895 + 19406896.

It is an arithmetic number, because the mean of its divisors is an integer number (19406896).

Almost surely, 2^38813791 is an apocalyptic number.

38813791 is a deficient number, since it is larger than the sum of its proper divisors (1).

38813791 is an equidigital number, since it uses as much as digits as its factorization.

38813791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 40.

The square root of 38813791 is about 6230.0715084179. The cubic root of 38813791 is about 338.5805615870.

The spelling of 38813791 in words is "thirty-eight million, eight hundred thirteen thousand, seven hundred ninety-one".