8443342621 has 32 divisors (see below), whose sum is σ = 10618214400. Its totient is φ = 6547046400.

The previous prime is 8443342597. The next prime is 8443342637. The reversal of 8443342621 is 1262433448.

It is a cyclic number.

It is not a de Polignac number, because 8443342621 - 2¹⁹ = 8442818333 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 (8443342121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 541981 + ... + 557341.

It is an arithmetic number, because the mean of its divisors is an integer number (331819200).

Almost surely, 2^8443342621 is an apocalyptic number.

It is an amenable number.

8443342621 is a deficient number, since it is larger than the sum of its proper divisors (2174871779).

8443342621 is a wasteful number, since it uses less digits than its factorization.

8443342621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15565.

The product of its digits is 110592, while the sum is 37.

The square root of 8443342621 is about 91887.6630511409. The cubic root of 8443342621 is about 2036.2830096058.

It can be divided in two parts, 84 and 43342621, that added together give a triangular number (43342705 = T₉₃₁₀).

The spelling of 8443342621 in words is "eight billion, four hundred forty-three million, three hundred forty-two thousand, six hundred twenty-one".