621323853 has 8 divisors (see below), whose sum is σ = 830134848. Its totient is φ = 413364384.

The previous prime is 621323849. The next prime is 621323873. The reversal of 621323853 is 358323126.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 621323853 - 2² = 621323849 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621323873) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 211176 + ... + 214097.

It is an arithmetic number, because the mean of its divisors is an integer number (103766856).

Almost surely, 2^621323853 is an apocalyptic number.

It is an amenable number.

621323853 is a deficient number, since it is larger than the sum of its proper divisors (208810995).

621323853 is a wasteful number, since it uses less digits than its factorization.

621323853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425763.

The product of its digits is 25920, while the sum is 33.

The square root of 621323853 is about 24926.3686284224. The cubic root of 621323853 is about 853.3083765318.

Adding to 621323853 its reverse (358323126), we get a palindrome (979646979).

The spelling of 621323853 in words is "six hundred twenty-one million, three hundred twenty-three thousand, eight hundred fifty-three".