778051 has 2 divisors, whose sum is σ = 778052. Its totient is φ = 778050.

The previous prime is 778049. The next prime is 778061. The reversal of 778051 is 150877.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 778051 - 2¹ = 778049 is a prime.

Together with 778049, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (778061) 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, 389025 + 389026.

It is an arithmetic number, because the mean of its divisors is an integer number (389026).

2⁷⁷⁸⁰⁵¹ is an apocalyptic number.

778051 is a deficient number, since it is larger than the sum of its proper divisors (1).

778051 is an equidigital number, since it uses as much as digits as its factorization.

778051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1960, while the sum is 28.

The square root of 778051 is about 882.0719925267. The cubic root of 778051 is about 91.9749065148.

It can be divided in two parts, 77 and 8051, that added together give a triangular number (8128 = T₁₂₇).

The spelling of 778051 in words is "seven hundred seventy-eight thousand, fifty-one".