383042921 has 2 divisors, whose sum is σ = 383042922. Its totient is φ = 383042920.

The previous prime is 383042909. The next prime is 383042923. The reversal of 383042921 is 129240383.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 348232921 + 34810000 = 18661^2 + 5900^2 .

It is a cyclic number.

It is not a de Polignac number, because 383042921 - 2¹⁴ = 383026537 is a prime.

Together with 383042923, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (383042923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 191521460 + 191521461.

It is an arithmetic number, because the mean of its divisors is an integer number (191521461).

Almost surely, 2^383042921 is an apocalyptic number.

It is an amenable number.

383042921 is a deficient number, since it is larger than the sum of its proper divisors (1).

383042921 is an equidigital number, since it uses as much as digits as its factorization.

383042921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 383042921 is about 19571.4823403850. The cubic root of 383042921 is about 726.2438708733.

The spelling of 383042921 in words is "three hundred eighty-three million, forty-two thousand, nine hundred twenty-one".