621306323 has 12 divisors (see below), whose sum is σ = 691578720. Its totient is φ = 557665680.

The previous prime is 621306319. The next prime is 621306349. The reversal of 621306323 is 323603126.

It is not a de Polignac number, because 621306323 - 2² = 621306319 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 621306292 and 621306301.

It is not an unprimeable number, because it can be changed into a prime (621306313) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22940 + ... + 42057.

It is an arithmetic number, because the mean of its divisors is an integer number (57631560).

Almost surely, 2^621306323 is an apocalyptic number.

621306323 is a deficient number, since it is larger than the sum of its proper divisors (70272397).

621306323 is a wasteful number, since it uses less digits than its factorization.

621306323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65098 (or 65087 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 26.

The square root of 621306323 is about 24926.0169902855. The cubic root of 621306323 is about 853.3003513898.

Adding to 621306323 its reverse (323603126), we get a palindrome (944909449).

The spelling of 621306323 in words is "six hundred twenty-one million, three hundred six thousand, three hundred twenty-three".