778013 has 2 divisors, whose sum is σ = 778014. Its totient is φ = 778012.

The previous prime is 777989. The next prime is 778027. The reversal of 778013 is 310877.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 743044 + 34969 = 862^2 + 187^2 .

It is a cyclic number.

It is not a de Polignac number, because 778013 - 2¹⁶ = 712477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (778213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 389006 + 389007.

It is an arithmetic number, because the mean of its divisors is an integer number (389007).

2⁷⁷⁸⁰¹³ is an apocalyptic number.

It is an amenable number.

778013 is a deficient number, since it is larger than the sum of its proper divisors (1).

778013 is an equidigital number, since it uses as much as digits as its factorization.

778013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1176, while the sum is 26.

The square root of 778013 is about 882.0504520718. The cubic root of 778013 is about 91.9734091394.

The spelling of 778013 in words is "seven hundred seventy-eight thousand, thirteen".