383406421 has 4 divisors (see below), whose sum is σ = 383446432. Its totient is φ = 383366412.

The previous prime is 383406409. The next prime is 383406427. The reversal of 383406421 is 124604383.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 383406421 - 2⁹ = 383405909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (383406427) 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, 3856 + ... + 27958.

It is an arithmetic number, because the mean of its divisors is an integer number (95861608).

Almost surely, 2^383406421 is an apocalyptic number.

It is an amenable number.

383406421 is a deficient number, since it is larger than the sum of its proper divisors (40011).

383406421 is a wasteful number, since it uses less digits than its factorization.

383406421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40010.

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 383406421 is about 19580.7666090988. The cubic root of 383406421 is about 726.4735284997.

The spelling of 383406421 in words is "three hundred eighty-three million, four hundred six thousand, four hundred twenty-one".