383791691 has 2 divisors, whose sum is σ = 383791692. Its totient is φ = 383791690.

The previous prime is 383791673. The next prime is 383791729. The reversal of 383791691 is 196197383.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 383791691 - 2¹⁴ = 383775307 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (383791601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 191895845 + 191895846.

It is an arithmetic number, because the mean of its divisors is an integer number (191895846).

Almost surely, 2^383791691 is an apocalyptic number.

383791691 is a deficient number, since it is larger than the sum of its proper divisors (1).

383791691 is an equidigital number, since it uses as much as digits as its factorization.

383791691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 244944, while the sum is 47.

The square root of 383791691 is about 19590.6021091747. The cubic root of 383791691 is about 726.7167819106.

The spelling of 383791691 in words is "three hundred eighty-three million, seven hundred ninety-one thousand, six hundred ninety-one".