978667543 has 24 divisors (see below), whose sum is σ = 1212264144. Its totient is φ = 785030400.

The previous prime is 978667541. The next prime is 978667559. The reversal of 978667543 is 345766879.

It is a happy number.

It is not a de Polignac number, because 978667543 - 2¹ = 978667541 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978667541) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 147528 + ... + 154018.

It is an arithmetic number, because the mean of its divisors is an integer number (50511006).

Almost surely, 2^978667543 is an apocalyptic number.

978667543 is a deficient number, since it is larger than the sum of its proper divisors (233596601).

978667543 is a wasteful number, since it uses less digits than its factorization.

978667543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6703 (or 6696 counting only the distinct ones).

The product of its digits is 7620480, while the sum is 55.

The square root of 978667543 is about 31283.6625573158. The cubic root of 978667543 is about 992.8380093458.

The spelling of 978667543 in words is "nine hundred seventy-eight million, six hundred sixty-seven thousand, five hundred forty-three".