8357643 has 12 divisors (see below), whose sum is σ = 13796848. Its totient is φ = 4775760.

The previous prime is 8357641. The next prime is 8357651. The reversal of 8357643 is 3467538.

It is a happy number.

8357643 is a `hidden beast` number, since 8 + 3 + 5 + 7 + 643 = 666.

It is not a de Polignac number, because 8357643 - 2¹ = 8357641 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8357598 and 8357607.

It is not an unprimeable number, because it can be changed into a prime (8357641) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66268 + ... + 66393.

Almost surely, 2^8357643 is an apocalyptic number.

8357643 is a deficient number, since it is larger than the sum of its proper divisors (5439205).

8357643 is a wasteful number, since it uses less digits than its factorization.

8357643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132674 (or 132671 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

The square root of 8357643 is about 2890.9588374794. The cubic root of 8357643 is about 202.9370168687.

The spelling of 8357643 in words is "eight million, three hundred fifty-seven thousand, six hundred forty-three".