978727 has 2 divisors, whose sum is σ = 978728. Its totient is φ = 978726.

The previous prime is 978713. The next prime is 978743. The reversal of 978727 is 727879.

It is a weak prime.

It is an emirp because it is prime and its reverse (727879) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 978727 - 2⁷ = 978599 is a prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 978727.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (978797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489363 + 489364.

It is an arithmetic number, because the mean of its divisors is an integer number (489364).

2⁹⁷⁸⁷²⁷ is an apocalyptic number.

978727 is a deficient number, since it is larger than the sum of its proper divisors (1).

978727 is an equidigital number, since it uses as much as digits as its factorization.

978727 is an evil number, because the sum of its binary digits is even.

The product of its digits is 49392, while the sum is 40.

The square root of 978727 is about 989.3063226322. The cubic root of 978727 is about 99.2858114905.

It can be divided in two parts, 97872 and 7, that added together give a palindrome (97879).

The spelling of 978727 in words is "nine hundred seventy-eight thousand, seven hundred twenty-seven".