383401691 has 2 divisors, whose sum is σ = 383401692. Its totient is φ = 383401690.

The previous prime is 383401679. The next prime is 383401699. The reversal of 383401691 is 196104383.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 383401691 - 2²⁶ = 316292827 is a prime.

It is not a weakly prime, because it can be changed into another prime (383401699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 191700845 + 191700846.

It is an arithmetic number, because the mean of its divisors is an integer number (191700846).

Almost surely, 2^383401691 is an apocalyptic number.

383401691 is a deficient number, since it is larger than the sum of its proper divisors (1).

383401691 is an equidigital number, since it uses as much as digits as its factorization.

383401691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 383401691 is about 19580.6458269384. The cubic root of 383401691 is about 726.4705410398.

The spelling of 383401691 in words is "three hundred eighty-three million, four hundred one thousand, six hundred ninety-one".