8394407641 has 3 divisors (see below), whose sum is σ = 8394499263. Its totient is φ = 8394316020.

The previous prime is 8394407639. The next prime is 8394407653. The reversal of 8394407641 is 1467044938.

The square root of 8394407641 is 91621.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 5688327241 + 2706080400 = 75421^2 + 52020^2 .

It is not a de Polignac number, because 8394407641 - 2¹ = 8394407639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8394407591 and 8394407600.

It is not an unprimeable number, because it can be changed into a prime (8394407141) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 45811 + ... + 137431.

It is an arithmetic number, because the mean of its divisors is an integer number (2798166421).

Almost surely, 2^8394407641 is an apocalyptic number.

8394407641 is the 91621-st square number.

8394407641 is the 45811-st centered octagonal number.

It is an amenable number.

8394407641 is a deficient number, since it is larger than the sum of its proper divisors (91622).

8394407641 is an frugal number, since it uses more digits than its factorization.

8394407641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183242 (or 91621 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 46.

The cubic root of 8394407641 is about 2032.3414981392.

The spelling of 8394407641 in words is "eight billion, three hundred ninety-four million, four hundred seven thousand, six hundred forty-one".