621000623 has 2 divisors, whose sum is σ = 621000624. Its totient is φ = 621000622.

The previous prime is 621000559. The next prime is 621000661. The reversal of 621000623 is 326000126.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 621000623 - 2⁶ = 621000559 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 621000595 and 621000604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (621000673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310500311 + 310500312.

It is an arithmetic number, because the mean of its divisors is an integer number (310500312).

Almost surely, 2^621000623 is an apocalyptic number.

621000623 is a deficient number, since it is larger than the sum of its proper divisors (1).

621000623 is an equidigital number, since it uses as much as digits as its factorization.

621000623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 621000623 is about 24919.8840888155. The cubic root of 621000623 is about 853.1603792580.

Adding to 621000623 its reverse (326000126), we get a palindrome (947000749).

The spelling of 621000623 in words is "six hundred twenty-one million, six hundred twenty-three", and thus it is an aban number.