383609881 has 2 divisors, whose sum is σ = 383609882. Its totient is φ = 383609880.

The previous prime is 383609869. The next prime is 383610011. The reversal of 383609881 is 188906383.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 381811600 + 1798281 = 19540^2 + 1341^2 .

It is a cyclic number.

It is not a de Polignac number, because 383609881 - 2²⁷ = 249392153 is a prime.

It is a super-2 number, since 2×383609881² = 294313081601668322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (383609851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 191804940 + 191804941.

It is an arithmetic number, because the mean of its divisors is an integer number (191804941).

Almost surely, 2^383609881 is an apocalyptic number.

It is an amenable number.

383609881 is a deficient number, since it is larger than the sum of its proper divisors (1).

383609881 is an equidigital number, since it uses as much as digits as its factorization.

383609881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 248832, while the sum is 46.

The square root of 383609881 is about 19585.9613243772. The cubic root of 383609881 is about 726.6020102345.

The spelling of 383609881 in words is "three hundred eighty-three million, six hundred nine thousand, eight hundred eighty-one".