782678423 has 2 divisors, whose sum is σ = 782678424. Its totient is φ = 782678422.

The previous prime is 782678411. The next prime is 782678437. The reversal of 782678423 is 324876287.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 782678423 - 2⁸ = 782678167 is a prime.

It is a super-2 number, since 2×782678423² = 1225171027659533858, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (782678023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 391339211 + 391339212.

It is an arithmetic number, because the mean of its divisors is an integer number (391339212).

Almost surely, 2^782678423 is an apocalyptic number.

782678423 is a deficient number, since it is larger than the sum of its proper divisors (1).

782678423 is an equidigital number, since it uses as much as digits as its factorization.

782678423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 903168, while the sum is 47.

The square root of 782678423 is about 27976.3904569550. The cubic root of 782678423 is about 921.5688508075.

The spelling of 782678423 in words is "seven hundred eighty-two million, six hundred seventy-eight thousand, four hundred twenty-three".