621103678 has 16 divisors (see below), whose sum is σ = 1004502240. Its totient is φ = 286325856.

The previous prime is 621103663. The next prime is 621103723. The reversal of 621103678 is 876301126.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 9183 + ... + 36421.

It is an arithmetic number, because the mean of its divisors is an integer number (62781390).

Almost surely, 2^621103678 is an apocalyptic number.

621103678 is a deficient number, since it is larger than the sum of its proper divisors (383398562).

621103678 is a wasteful number, since it uses less digits than its factorization.

621103678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28131.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 621103678 is about 24921.9517293490. The cubic root of 621103678 is about 853.2075706115.

The spelling of 621103678 in words is "six hundred twenty-one million, one hundred three thousand, six hundred seventy-eight".