78148019 has 2 divisors, whose sum is σ = 78148020. Its totient is φ = 78148018.

The previous prime is 78148003. The next prime is 78148061. The reversal of 78148019 is 91084187.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78148019 - 2⁴ = 78148003 is a prime.

It is a super-2 number, since 2×78148019² = 12214225747248722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (78148619) 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, 39074009 + 39074010.

It is an arithmetic number, because the mean of its divisors is an integer number (39074010).

Almost surely, 2^78148019 is an apocalyptic number.

78148019 is a deficient number, since it is larger than the sum of its proper divisors (1).

78148019 is an equidigital number, since it uses as much as digits as its factorization.

78148019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 38.

The square root of 78148019 is about 8840.1368202082. The cubic root of 78148019 is about 427.5359686116.

The spelling of 78148019 in words is "seventy-eight million, one hundred forty-eight thousand, nineteen".