621411163 has 4 divisors (see below), whose sum is σ = 621598768. Its totient is φ = 621223560.

The previous prime is 621411137. The next prime is 621411173. The reversal of 621411163 is 361114126.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-621411163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (621411173) 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 in 3 ways as a sum of consecutive naturals, for example, 88743 + ... + 95488.

It is an arithmetic number, because the mean of its divisors is an integer number (155399692).

Almost surely, 2^621411163 is an apocalyptic number.

621411163 is a deficient number, since it is larger than the sum of its proper divisors (187605).

621411163 is a wasteful number, since it uses less digits than its factorization.

621411163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187604.

The product of its digits is 864, while the sum is 25.

The square root of 621411163 is about 24928.1199250966. The cubic root of 621411163 is about 853.3483443438.

Adding to 621411163 its reverse (361114126), we get a palindrome (982525289).

The spelling of 621411163 in words is "six hundred twenty-one million, four hundred eleven thousand, one hundred sixty-three".