978725543 has 2 divisors, whose sum is σ = 978725544. Its totient is φ = 978725542.

The previous prime is 978725519. The next prime is 978725551. The reversal of 978725543 is 345527879.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 978725543 - 2¹⁰ = 978724519 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 978725491 and 978725500.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (978721543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489362771 + 489362772.

It is an arithmetic number, because the mean of its divisors is an integer number (489362772).

Almost surely, 2^978725543 is an apocalyptic number.

978725543 is a deficient number, since it is larger than the sum of its proper divisors (1).

978725543 is an equidigital number, since it uses as much as digits as its factorization.

978725543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2116800, while the sum is 50.

The square root of 978725543 is about 31284.5895450140. The cubic root of 978725543 is about 992.8576222258.

The spelling of 978725543 in words is "nine hundred seventy-eight million, seven hundred twenty-five thousand, five hundred forty-three".