38319791 has 2 divisors, whose sum is σ = 38319792. Its totient is φ = 38319790.

The previous prime is 38319781. The next prime is 38319793. The reversal of 38319791 is 19791383.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 38319791 - 2¹⁴ = 38303407 is a prime.

It is a Sophie Germain prime.

Together with 38319793, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38319793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19159895 + 19159896.

It is an arithmetic number, because the mean of its divisors is an integer number (19159896).

Almost surely, 2^38319791 is an apocalyptic number.

38319791 is a deficient number, since it is larger than the sum of its proper divisors (1).

38319791 is an equidigital number, since it uses as much as digits as its factorization.

38319791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40824, while the sum is 41.

The square root of 38319791 is about 6190.2981349851. The cubic root of 38319791 is about 337.1380034544.

The spelling of 38319791 in words is "thirty-eight million, three hundred nineteen thousand, seven hundred ninety-one".