78712619 has 2 divisors, whose sum is σ = 78712620. Its totient is φ = 78712618.

The previous prime is 78712607. The next prime is 78712637. The reversal of 78712619 is 91621787.

It is a weak prime.

It is an emirp because it is prime and its reverse (91621787) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78712619 - 2⁴ = 78712603 is a prime.

It is a super-2 number, since 2×78712619² = 12391352779678322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (78712679) 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, 39356309 + 39356310.

It is an arithmetic number, because the mean of its divisors is an integer number (39356310).

Almost surely, 2^78712619 is an apocalyptic number.

78712619 is a deficient number, since it is larger than the sum of its proper divisors (1).

78712619 is an equidigital number, since it uses as much as digits as its factorization.

78712619 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42336, while the sum is 41.

The square root of 78712619 is about 8872.0132439036. The cubic root of 78712619 is about 428.5631126270.

The spelling of 78712619 in words is "seventy-eight million, seven hundred twelve thousand, six hundred nineteen".