78336623 has 2 divisors, whose sum is σ = 78336624. Its totient is φ = 78336622.

The previous prime is 78336617. The next prime is 78336641. The reversal of 78336623 is 32663387.

It is a weak prime.

It is an emirp because it is prime and its reverse (32663387) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78336623 - 2⁴ = 78336607 is a prime.

It is a super-2 number, since 2×78336623² = 12273253006088258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78336653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39168311 + 39168312.

It is an arithmetic number, because the mean of its divisors is an integer number (39168312).

Almost surely, 2^78336623 is an apocalyptic number.

78336623 is a deficient number, since it is larger than the sum of its proper divisors (1).

78336623 is an equidigital number, since it uses as much as digits as its factorization.

78336623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 38.

The square root of 78336623 is about 8850.7978736383. The cubic root of 78336623 is about 427.8796335907.

The spelling of 78336623 in words is "seventy-eight million, three hundred thirty-six thousand, six hundred twenty-three".