781304423 has 2 divisors, whose sum is σ = 781304424. Its totient is φ = 781304422.

The previous prime is 781304413. The next prime is 781304437. The reversal of 781304423 is 324403187.

781304423 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (324403187) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 781304423 - 2¹² = 781300327 is a prime.

It is a super-2 number, since 2×781304423² = 1220873202798725858, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 781304423.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (781304413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 390652211 + 390652212.

It is an arithmetic number, because the mean of its divisors is an integer number (390652212).

Almost surely, 2^781304423 is an apocalyptic number.

781304423 is a deficient number, since it is larger than the sum of its proper divisors (1).

781304423 is an equidigital number, since it uses as much as digits as its factorization.

781304423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 781304423 is about 27951.8232500136. The cubic root of 781304423 is about 921.0292604085.

The spelling of 781304423 in words is "seven hundred eighty-one million, three hundred four thousand, four hundred twenty-three".