778097 has 2 divisors, whose sum is σ = 778098. Its totient is φ = 778096.

The previous prime is 778091. The next prime is 778109. The reversal of 778097 is 790877.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 776161 + 1936 = 881^2 + 44^2 .

It is a cyclic number.

It is not a de Polignac number, because 778097 - 2⁴ = 778081 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 778097.

It is not a weakly prime, because it can be changed into another prime (778091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 389048 + 389049.

It is an arithmetic number, because the mean of its divisors is an integer number (389049).

2⁷⁷⁸⁰⁹⁷ is an apocalyptic number.

It is an amenable number.

778097 is a deficient number, since it is larger than the sum of its proper divisors (1).

778097 is an equidigital number, since it uses as much as digits as its factorization.

778097 is an evil number, because the sum of its binary digits is even.

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

The square root of 778097 is about 882.0980671105. The cubic root of 778097 is about 91.9767190619.

The spelling of 778097 in words is "seven hundred seventy-eight thousand, ninety-seven".