38791091 has 2 divisors, whose sum is σ = 38791092. Its totient is φ = 38791090.

The previous prime is 38791079. The next prime is 38791097. The reversal of 38791091 is 19019783.

It is a strong prime.

It is an emirp because it is prime and its reverse (19019783) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 38791091 - 2²² = 34596787 is a prime.

It is not a weakly prime, because it can be changed into another prime (38791097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19395545 + 19395546.

It is an arithmetic number, because the mean of its divisors is an integer number (19395546).

Almost surely, 2^38791091 is an apocalyptic number.

38791091 is a deficient number, since it is larger than the sum of its proper divisors (1).

38791091 is an equidigital number, since it uses as much as digits as its factorization.

38791091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 38.

The square root of 38791091 is about 6228.2494330269. The cubic root of 38791091 is about 338.5145431490.

The spelling of 38791091 in words is "thirty-eight million, seven hundred ninety-one thousand, ninety-one".