621598841 has 4 divisors (see below), whose sum is σ = 636054672. Its totient is φ = 607143012.

The previous prime is 621598819. The next prime is 621598877. The reversal of 621598841 is 148895126.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 621598841 - 2⁶ = 621598777 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 621598792 and 621598801.

It is not an unprimeable number, because it can be changed into a prime (621598891) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7227851 + ... + 7227936.

It is an arithmetic number, because the mean of its divisors is an integer number (159013668).

Almost surely, 2^621598841 is an apocalyptic number.

It is an amenable number.

621598841 is a deficient number, since it is larger than the sum of its proper divisors (14455831).

621598841 is a wasteful number, since it uses less digits than its factorization.

621598841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14455830.

The product of its digits is 138240, while the sum is 44.

The square root of 621598841 is about 24931.8840242770. The cubic root of 621598841 is about 853.4342448445.

The spelling of 621598841 in words is "six hundred twenty-one million, five hundred ninety-eight thousand, eight hundred forty-one".