621148963 has 2 divisors, whose sum is σ = 621148964. Its totient is φ = 621148962.

The previous prime is 621148961. The next prime is 621148981. The reversal of 621148963 is 369841126.

621148963 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 621148963 - 2¹ = 621148961 is a prime.

Together with 621148961, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (621148961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310574481 + 310574482.

It is an arithmetic number, because the mean of its divisors is an integer number (310574482).

Almost surely, 2^621148963 is an apocalyptic number.

621148963 is a deficient number, since it is larger than the sum of its proper divisors (1).

621148963 is an equidigital number, since it uses as much as digits as its factorization.

621148963 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 40.

The square root of 621148963 is about 24922.8602491769. The cubic root of 621148963 is about 853.2283060470.

The spelling of 621148963 in words is "six hundred twenty-one million, one hundred forty-eight thousand, nine hundred sixty-three".