383536921 has 4 divisors (see below), whose sum is σ = 383807872. Its totient is φ = 383265972.

The previous prime is 383536913. The next prime is 383536939. The reversal of 383536921 is 129635383.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 383536921 - 2³ = 383536913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (383536421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133341 + ... + 136186.

It is an arithmetic number, because the mean of its divisors is an integer number (95951968).

Almost surely, 2^383536921 is an apocalyptic number.

It is an amenable number.

383536921 is a deficient number, since it is larger than the sum of its proper divisors (270951).

383536921 is a wasteful number, since it uses less digits than its factorization.

383536921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270950.

The product of its digits is 116640, while the sum is 40.

The square root of 383536921 is about 19584.0986772432. The cubic root of 383536921 is about 726.5559423875. Note that the first 3 decimals are identical.

The spelling of 383536921 in words is "three hundred eighty-three million, five hundred thirty-six thousand, nine hundred twenty-one".