78434263 has 2 divisors, whose sum is σ = 78434264. Its totient is φ = 78434262.

The previous prime is 78434249. The next prime is 78434267. The reversal of 78434263 is 36243487.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78434263 - 2⁵ = 78434231 is a prime.

It is a super-2 number, since 2×78434263² = 12303867224706338, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78434267) 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, 39217131 + 39217132.

It is an arithmetic number, because the mean of its divisors is an integer number (39217132).

Almost surely, 2^78434263 is an apocalyptic number.

78434263 is a deficient number, since it is larger than the sum of its proper divisors (1).

78434263 is an equidigital number, since it uses as much as digits as its factorization.

78434263 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 37.

The square root of 78434263 is about 8856.3120428314. The cubic root of 78434263 is about 428.0573317528.

The spelling of 78434263 in words is "seventy-eight million, four hundred thirty-four thousand, two hundred sixty-three".