621346123 has 4 divisors (see below), whose sum is σ = 621435568. Its totient is φ = 621256680.

The previous prime is 621346097. The next prime is 621346133. The reversal of 621346123 is 321643126.

621346123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 621346123 - 2¹³ = 621337931 is a prime.

It is a super-2 number, since 2×621346123² = 772142009134262258, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 621346091 and 621346100.

It is not an unprimeable number, because it can be changed into a prime (621346133) 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, 33336 + ... + 48517.

It is an arithmetic number, because the mean of its divisors is an integer number (155358892).

Almost surely, 2^621346123 is an apocalyptic number.

621346123 is a deficient number, since it is larger than the sum of its proper divisors (89445).

621346123 is an equidigital number, since it uses as much as digits as its factorization.

621346123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89444.

The product of its digits is 5184, while the sum is 28.

The square root of 621346123 is about 24926.8153401111. The cubic root of 621346123 is about 853.3185714033.

Adding to 621346123 its reverse (321643126), we get a palindrome (942989249).

The spelling of 621346123 in words is "six hundred twenty-one million, three hundred forty-six thousand, one hundred twenty-three".