78779059 has 2 divisors, whose sum is σ = 78779060. Its totient is φ = 78779058.

The previous prime is 78779047. The next prime is 78779083. The reversal of 78779059 is 95097787.

It is a weak prime.

It is an emirp because it is prime and its reverse (95097787) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78779059 - 2⁵ = 78779027 is a prime.

It is a super-2 number, since 2×78779059² = 12412280273850962, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78778997 and 78779015.

It is not a weakly prime, because it can be changed into another prime (78779009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39389529 + 39389530.

It is an arithmetic number, because the mean of its divisors is an integer number (39389530).

Almost surely, 2^78779059 is an apocalyptic number.

78779059 is a deficient number, since it is larger than the sum of its proper divisors (1).

78779059 is an equidigital number, since it uses as much as digits as its factorization.

78779059 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1111320, while the sum is 52.

The square root of 78779059 is about 8875.7568128019. The cubic root of 78779059 is about 428.6836596918.

The spelling of 78779059 in words is "seventy-eight million, seven hundred seventy-nine thousand, fifty-nine".