830621 has 4 divisors (see below), whose sum is σ = 906144. Its totient is φ = 755100.

The previous prime is 830617. The next prime is 830639. The reversal of 830621 is 126038.

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 830621 - 2² = 830617 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 830593 and 830602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (832621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37745 + ... + 37766.

It is an arithmetic number, because the mean of its divisors is an integer number (226536).

2⁸³⁰⁶²¹ is an apocalyptic number.

It is an amenable number.

830621 is a deficient number, since it is larger than the sum of its proper divisors (75523).

830621 is a wasteful number, since it uses less digits than its factorization.

830621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75522.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 830621 is about 911.3841122161. The cubic root of 830621 is about 94.0013957843.

Adding to 830621 its reverse (126038), we get a palindrome (956659).

The spelling of 830621 in words is "eight hundred thirty thousand, six hundred twenty-one".