621342539 has 16 divisors (see below), whose sum is σ = 656292672. Its totient is φ = 587102208.

The previous prime is 621342529. The next prime is 621342551. The reversal of 621342539 is 935243126.

621342539 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 621342539 - 2⁸ = 621342283 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 621342499 and 621342508.

It is not an unprimeable number, because it can be changed into a prime (621342509) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 922907 + ... + 923579.

It is an arithmetic number, because the mean of its divisors is an integer number (41018292).

Almost surely, 2^621342539 is an apocalyptic number.

621342539 is a deficient number, since it is larger than the sum of its proper divisors (34950133).

621342539 is a wasteful number, since it uses less digits than its factorization.

621342539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1126.

The product of its digits is 38880, while the sum is 35.

The square root of 621342539 is about 24926.7434495563. The cubic root of 621342539 is about 853.3169307184.

The spelling of 621342539 in words is "six hundred twenty-one million, three hundred forty-two thousand, five hundred thirty-nine".