621145463 has 2 divisors, whose sum is σ = 621145464. Its totient is φ = 621145462.

The previous prime is 621145453. The next prime is 621145487. The reversal of 621145463 is 364541126.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 621145463 - 2²⁰ = 620096887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (621145453) 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, 310572731 + 310572732.

It is an arithmetic number, because the mean of its divisors is an integer number (310572732).

Almost surely, 2^621145463 is an apocalyptic number.

621145463 is a deficient number, since it is larger than the sum of its proper divisors (1).

621145463 is an equidigital number, since it uses as much as digits as its factorization.

621145463 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 32.

The square root of 621145463 is about 24922.7900324181. The cubic root of 621145463 is about 853.2267034767.

Adding to 621145463 its reverse (364541126), we get a palindrome (985686589).

The spelling of 621145463 in words is "six hundred twenty-one million, one hundred forty-five thousand, four hundred sixty-three".