776840423 has 2 divisors, whose sum is σ = 776840424. Its totient is φ = 776840422.

The previous prime is 776840401. The next prime is 776840443. The reversal of 776840423 is 324048677.

It is a strong prime.

It is an emirp because it is prime and its reverse (324048677) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 776840423 - 2¹² = 776836327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (776840443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 388420211 + 388420212.

It is an arithmetic number, because the mean of its divisors is an integer number (388420212).

Almost surely, 2^776840423 is an apocalyptic number.

776840423 is a deficient number, since it is larger than the sum of its proper divisors (1).

776840423 is an equidigital number, since it uses as much as digits as its factorization.

776840423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 225792, while the sum is 41.

The square root of 776840423 is about 27871.8571860578. The cubic root of 776840423 is about 919.2718020774.

The spelling of 776840423 in words is "seven hundred seventy-six million, eight hundred forty thousand, four hundred twenty-three".