978773 has 2 divisors, whose sum is σ = 978774. Its totient is φ = 978772.

The previous prime is 978749. The next prime is 978797. The reversal of 978773 is 377879.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (978749) and next prime (978797).

It can be written as a sum of positive squares in only one way, i.e., 917764 + 61009 = 958^2 + 247^2 .

It is a cyclic number.

It is not a de Polignac number, because 978773 - 2¹⁸ = 716629 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 978773.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (978713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489386 + 489387.

It is an arithmetic number, because the mean of its divisors is an integer number (489387).

2⁹⁷⁸⁷⁷³ is an apocalyptic number.

It is an amenable number.

978773 is a deficient number, since it is larger than the sum of its proper divisors (1).

978773 is an equidigital number, since it uses as much as digits as its factorization.

978773 is an evil number, because the sum of its binary digits is even.

The product of its digits is 74088, while the sum is 41.

The square root of 978773 is about 989.3295709722. The cubic root of 978773 is about 99.2873669381.

The spelling of 978773 in words is "nine hundred seventy-eight thousand, seven hundred seventy-three".