621943 has 8 divisors (see below), whose sum is σ = 741888. Its totient is φ = 509784.

The previous prime is 621941. The next prime is 621983. The reversal of 621943 is 349126.

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

It is a cyclic number.

It is not a de Polignac number, because 621943 - 2¹ = 621941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621941) 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, 1771 + ... + 2092.

It is an arithmetic number, because the mean of its divisors is an integer number (92736).

2⁶²¹⁹⁴³ is an apocalyptic number.

621943 is a deficient number, since it is larger than the sum of its proper divisors (119945).

621943 is a wasteful number, since it uses less digits than its factorization.

621943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3893.

The product of its digits is 1296, while the sum is 25.

The square root of 621943 is about 788.6336284993. The cubic root of 621943 is about 85.3591722018.

The spelling of 621943 in words is "six hundred twenty-one thousand, nine hundred forty-three".