621420063 has 12 divisors (see below), whose sum is σ = 910731864. Its totient is φ = 376618000.

The previous prime is 621420053. The next prime is 621420077. The reversal of 621420063 is 360024126.

It is not a de Polignac number, because 621420063 - 2⁶ = 621419999 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621420013) 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, 855588 + ... + 856313.

It is an arithmetic number, because the mean of its divisors is an integer number (75894322).

Almost surely, 2^621420063 is an apocalyptic number.

621420063 is a deficient number, since it is larger than the sum of its proper divisors (289311801).

621420063 is a wasteful number, since it uses less digits than its factorization.

621420063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1711926 (or 1711915 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 621420063 is about 24928.2984377193. The cubic root of 621420063 is about 853.3524182777.

Adding to 621420063 its reverse (360024126), we get a palindrome (981444189).

The spelling of 621420063 in words is "six hundred twenty-one million, four hundred twenty thousand, sixty-three".