621106717 has 16 divisors (see below), whose sum is σ = 801072000. Its totient is φ = 467288640.

The previous prime is 621106711. The next prime is 621106721. The reversal of 621106717 is 717601126.

It is not a de Polignac number, because 621106717 - 2³ = 621106709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621106711) 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 15 ways as a sum of consecutive naturals, for example, 136842 + ... + 141307.

It is an arithmetic number, because the mean of its divisors is an integer number (50067000).

Almost surely, 2^621106717 is an apocalyptic number.

It is an amenable number.

621106717 is a deficient number, since it is larger than the sum of its proper divisors (179965283).

621106717 is a wasteful number, since it uses less digits than its factorization.

621106717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278196.

The product of its (nonzero) digits is 3528, while the sum is 31.

The square root of 621106717 is about 24922.0126996196. The cubic root of 621106717 is about 853.2089621631.

The spelling of 621106717 in words is "six hundred twenty-one million, one hundred six thousand, seven hundred seventeen".