70784947 has 2 divisors, whose sum is σ = 70784948. Its totient is φ = 70784946.

The previous prime is 70784939. The next prime is 70784953. The reversal of 70784947 is 74948707.

It is a strong prime.

It is an emirp because it is prime and its reverse (74948707) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70784947 - 2³ = 70784939 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 70784897 and 70784906.

It is not a weakly prime, because it can be changed into another prime (70784977) 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, 35392473 + 35392474.

It is an arithmetic number, because the mean of its divisors is an integer number (35392474).

Almost surely, 2^70784947 is an apocalyptic number.

70784947 is a deficient number, since it is larger than the sum of its proper divisors (1).

70784947 is an equidigital number, since it uses as much as digits as its factorization.

70784947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 395136, while the sum is 46.

The square root of 70784947 is about 8413.3790476835. The cubic root of 70784947 is about 413.6632792269.

The spelling of 70784947 in words is "seventy million, seven hundred eighty-four thousand, nine hundred forty-seven".