978743 has 2 divisors, whose sum is σ = 978744. Its totient is φ = 978742.

The previous prime is 978727. The next prime is 978749. The reversal of 978743 is 347879.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 978743 - 2⁴ = 978727 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 978697 and 978706.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (978749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489371 + 489372.

It is an arithmetic number, because the mean of its divisors is an integer number (489372).

2⁹⁷⁸⁷⁴³ is an apocalyptic number.

978743 is a deficient number, since it is larger than the sum of its proper divisors (1).

978743 is an equidigital number, since it uses as much as digits as its factorization.

978743 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42336, while the sum is 38.

The square root of 978743 is about 989.3144090733. The cubic root of 978743 is about 99.2863525213.

The spelling of 978743 in words is "nine hundred seventy-eight thousand, seven hundred forty-three".