70128347 has 2 divisors, whose sum is σ = 70128348. Its totient is φ = 70128346.

The previous prime is 70128343. The next prime is 70128397. The reversal of 70128347 is 74382107.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (74382107) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70128347 - 2² = 70128343 is a prime.

It is not a weakly prime, because it can be changed into another prime (70128341) 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, 35064173 + 35064174.

It is an arithmetic number, because the mean of its divisors is an integer number (35064174).

Almost surely, 2^70128347 is an apocalyptic number.

70128347 is a deficient number, since it is larger than the sum of its proper divisors (1).

70128347 is an equidigital number, since it uses as much as digits as its factorization.

70128347 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 70128347 is about 8374.2669529936. The cubic root of 70128347 is about 412.3802593374.

The spelling of 70128347 in words is "seventy million, one hundred twenty-eight thousand, three hundred forty-seven".