621306703 has 2 divisors, whose sum is σ = 621306704. Its totient is φ = 621306702.

The previous prime is 621306689. The next prime is 621306713. The reversal of 621306703 is 307603126.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 621306703 - 2¹³ = 621298511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (621306713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310653351 + 310653352.

It is an arithmetic number, because the mean of its divisors is an integer number (310653352).

Almost surely, 2^621306703 is an apocalyptic number.

621306703 is a deficient number, since it is larger than the sum of its proper divisors (1).

621306703 is an equidigital number, since it uses as much as digits as its factorization.

621306703 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 28.

The square root of 621306703 is about 24926.0246128419. The cubic root of 621306703 is about 853.3005253534.

Adding to 621306703 its reverse (307603126), we get a palindrome (928909829).

The spelling of 621306703 in words is "six hundred twenty-one million, three hundred six thousand, seven hundred three".