978769303877 has 2 divisors, whose sum is σ = 978769303878. Its totient is φ = 978769303876.

The previous prime is 978769303871. The next prime is 978769303933. The reversal of 978769303877 is 778303967879.

978769303877 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 694673907841 + 284095396036 = 833471^2 + 533006^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-978769303877 is a prime.

It is a super-2 number, since 2×978769303877² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (978769303871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489384651938 + 489384651939.

It is an arithmetic number, because the mean of its divisors is an integer number (489384651939).

Almost surely, 2^978769303877 is an apocalyptic number.

It is an amenable number.

978769303877 is a deficient number, since it is larger than the sum of its proper divisors (1).

978769303877 is an equidigital number, since it uses as much as digits as its factorization.

978769303877 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672126336, while the sum is 74.

The spelling of 978769303877 in words is "nine hundred seventy-eight billion, seven hundred sixty-nine million, three hundred three thousand, eight hundred seventy-seven".