621982239 has 8 divisors (see below), whose sum is σ = 841687680. Its totient is φ = 408465816.

The previous prime is 621982217. The next prime is 621982243. The reversal of 621982239 is 932289126.

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

It is not a de Polignac number, because 621982239 - 2⁹ = 621981727 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 621982239.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621982939) 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, 1547019 + ... + 1547420.

It is an arithmetic number, because the mean of its divisors is an integer number (105210960).

Almost surely, 2^621982239 is an apocalyptic number.

621982239 is a deficient number, since it is larger than the sum of its proper divisors (219705441).

621982239 is a wasteful number, since it uses less digits than its factorization.

621982239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3094509.

The product of its digits is 93312, while the sum is 42.

The square root of 621982239 is about 24939.5717485285. The cubic root of 621982239 is about 853.6096729563.

The spelling of 621982239 in words is "six hundred twenty-one million, nine hundred eighty-two thousand, two hundred thirty-nine".