621793641 has 8 divisors (see below), whose sum is σ = 947495104. Its totient is φ = 355310640.

The previous prime is 621793637. The next prime is 621793643. The reversal of 621793641 is 146397126.

621793641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 621793641 - 2² = 621793637 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 621793641.

It is not an unprimeable number, because it can be changed into a prime (621793643) 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, 14804590 + ... + 14804631.

It is an arithmetic number, because the mean of its divisors is an integer number (118436888).

Almost surely, 2^621793641 is an apocalyptic number.

It is an amenable number.

621793641 is a deficient number, since it is larger than the sum of its proper divisors (325701463).

621793641 is a wasteful number, since it uses less digits than its factorization.

621793641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29609231.

The product of its digits is 54432, while the sum is 39.

The square root of 621793641 is about 24935.7903624489. The cubic root of 621793641 is about 853.5233868099.

The spelling of 621793641 in words is "six hundred twenty-one million, seven hundred ninety-three thousand, six hundred forty-one".