978077 has 2 divisors, whose sum is σ = 978078. Its totient is φ = 978076.

The previous prime is 978073. The next prime is 978079. The reversal of 978077 is 770879.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 657721 + 320356 = 811^2 + 566^2 .

It is a cyclic number.

It is not a de Polignac number, because 978077 - 2² = 978073 is a prime.

Together with 978079, it forms a pair of twin primes.

It is a Chen 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 978077.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 978077.

It is not a weakly prime, because it can be changed into another prime (978071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489038 + 489039.

It is an arithmetic number, because the mean of its divisors is an integer number (489039).

2⁹⁷⁸⁰⁷⁷ is an apocalyptic number.

It is an amenable number.

978077 is a deficient number, since it is larger than the sum of its proper divisors (1).

978077 is an equidigital number, since it uses as much as digits as its factorization.

978077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24696, while the sum is 38.

The square root of 978077 is about 988.9777550582. The cubic root of 978077 is about 99.2638271273.

The spelling of 978077 in words is "nine hundred seventy-eight thousand, seventy-seven".