621383 has 8 divisors (see below), whose sum is σ = 734880. Its totient is φ = 514080.

The previous prime is 621371. The next prime is 621389. The reversal of 621383 is 383126.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 621383 - 2¹⁰ = 620359 is a prime.

It is a super-2 number, since 2×621383² = 772233665378, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 621383.

It is not an unprimeable number, because it can be changed into a prime (621389) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1328 + ... + 1733.

It is an arithmetic number, because the mean of its divisors is an integer number (91860).

2⁶²¹³⁸³ is an apocalyptic number.

621383 is a deficient number, since it is larger than the sum of its proper divisors (113497).

621383 is a wasteful number, since it uses less digits than its factorization.

621383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3097.

The product of its digits is 864, while the sum is 23.

The square root of 621383 is about 788.2785040834. The cubic root of 621383 is about 85.3335452604. Note that the first 3 decimals are identical.

The spelling of 621383 in words is "six hundred twenty-one thousand, three hundred eighty-three".