621108873 has 48 divisors (see below), whose sum is σ = 1122840576. Its totient is φ = 321412320.

The previous prime is 621108857. The next prime is 621108883. The reversal of 621108873 is 378801126.

It is not a de Polignac number, because 621108873 - 2⁴ = 621108857 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (621108853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 194536 + ... + 197702.

It is an arithmetic number, because the mean of its divisors is an integer number (23392512).

Almost surely, 2^621108873 is an apocalyptic number.

621108873 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

It is an amenable number.

621108873 is a deficient number, since it is larger than the sum of its proper divisors (501731703).

621108873 is a wasteful number, since it uses less digits than its factorization.

621108873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3474 (or 3471 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 621108873 is about 24922.0559545155. The cubic root of 621108873 is about 853.2099493882.

Adding to 621108873 its reverse (378801126), we get a palindrome (999909999).

The spelling of 621108873 in words is "six hundred twenty-one million, one hundred eight thousand, eight hundred seventy-three".