659951543 has 12 divisors (see below), whose sum is σ = 708628320. Its totient is φ = 612393600.

The previous prime is 659951533. The next prime is 659951569. The reversal of 659951543 is 345159956.

It is not a de Polignac number, because 659951543 - 2¹⁰ = 659950519 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 (659951533) 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, 941093 + ... + 941793.

It is an arithmetic number, because the mean of its divisors is an integer number (59052360).

Almost surely, 2^659951543 is an apocalyptic number.

659951543 is a deficient number, since it is larger than the sum of its proper divisors (48676777).

659951543 is an frugal number, since it uses more digits than its factorization.

659951543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1498 (or 797 counting only the distinct ones).

The product of its digits is 729000, while the sum is 47.

The square root of 659951543 is about 25689.5220469358. The cubic root of 659951543 is about 870.6374607615.

The spelling of 659951543 in words is "six hundred fifty-nine million, nine hundred fifty-one thousand, five hundred forty-three".