621622237 has 8 divisors (see below), whose sum is σ = 641956952. Its totient is φ = 601473600.

The previous prime is 621622159. The next prime is 621622241. The reversal of 621622237 is 732226126.

It can be written as a sum of positive squares in 4 ways, for example, as 61873956 + 559748281 = 7866^2 + 23659^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 621622237 - 2¹⁵ = 621589469 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 621622199 and 621622208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621602237) 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, 39714 + ... + 53107.

It is an arithmetic number, because the mean of its divisors is an integer number (80244619).

Almost surely, 2^621622237 is an apocalyptic number.

It is an amenable number.

621622237 is a deficient number, since it is larger than the sum of its proper divisors (20334715).

621622237 is a wasteful number, since it uses less digits than its factorization.

621622237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93039.

The product of its digits is 12096, while the sum is 31.

The square root of 621622237 is about 24932.3532182584. The cubic root of 621622237 is about 853.4449520164. Note that the first 3 decimals are identical.

The spelling of 621622237 in words is "six hundred twenty-one million, six hundred twenty-two thousand, two hundred thirty-seven".