78280259 has 2 divisors, whose sum is σ = 78280260. Its totient is φ = 78280258.

The previous prime is 78280211. The next prime is 78280273. The reversal of 78280259 is 95208287.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78280259 - 2⁸ = 78280003 is a prime.

It is a super-2 number, since 2×78280259² = 12255597898214162, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78280289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39140129 + 39140130.

It is an arithmetic number, because the mean of its divisors is an integer number (39140130).

Almost surely, 2^78280259 is an apocalyptic number.

78280259 is a deficient number, since it is larger than the sum of its proper divisors (1).

78280259 is an equidigital number, since it uses as much as digits as its factorization.

78280259 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 78280259 is about 8847.6131809658. The cubic root of 78280259 is about 427.7769877137.

The spelling of 78280259 in words is "seventy-eight million, two hundred eighty thousand, two hundred fifty-nine".