78386263 has 2 divisors, whose sum is σ = 78386264. Its totient is φ = 78386262.

The previous prime is 78386261. The next prime is 78386353. The reversal of 78386263 is 36268387.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78386263 - 2¹ = 78386261 is a prime.

It is a super-2 number, since 2×78386263² = 12288812454210338, which contains 22 as substring.

Together with 78386261, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78386261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39193131 + 39193132.

It is an arithmetic number, because the mean of its divisors is an integer number (39193132).

Almost surely, 2^78386263 is an apocalyptic number.

78386263 is a deficient number, since it is larger than the sum of its proper divisors (1).

78386263 is an equidigital number, since it uses as much as digits as its factorization.

78386263 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304, while the sum is 43.

The square root of 78386263 is about 8853.6016964849. The cubic root of 78386263 is about 427.9699934563.

The spelling of 78386263 in words is "seventy-eight million, three hundred eighty-six thousand, two hundred sixty-three".