78057347 has 2 divisors, whose sum is σ = 78057348. Its totient is φ = 78057346.

The previous prime is 78057323. The next prime is 78057373. The reversal of 78057347 is 74375087.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78057347 - 2⁶ = 78057283 is a prime.

It is not a weakly prime, because it can be changed into another prime (78027347) 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, 39028673 + 39028674.

It is an arithmetic number, because the mean of its divisors is an integer number (39028674).

Almost surely, 2^78057347 is an apocalyptic number.

78057347 is a deficient number, since it is larger than the sum of its proper divisors (1).

78057347 is an equidigital number, since it uses as much as digits as its factorization.

78057347 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 164640, while the sum is 41.

The square root of 78057347 is about 8835.0069043550. The cubic root of 78057347 is about 427.3705536968.

The spelling of 78057347 in words is "seventy-eight million, fifty-seven thousand, three hundred forty-seven".