70545779 has 2 divisors, whose sum is σ = 70545780. Its totient is φ = 70545778.

The previous prime is 70545763. The next prime is 70545799. The reversal of 70545779 is 97754507.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 70545779 - 2⁴ = 70545763 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (70545749) 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, 35272889 + 35272890.

It is an arithmetic number, because the mean of its divisors is an integer number (35272890).

Almost surely, 2^70545779 is an apocalyptic number.

70545779 is a deficient number, since it is larger than the sum of its proper divisors (1).

70545779 is an equidigital number, since it uses as much as digits as its factorization.

70545779 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 308700, while the sum is 44.

The square root of 70545779 is about 8399.1534692491. The cubic root of 70545779 is about 413.1968587042.

The spelling of 70545779 in words is "seventy million, five hundred forty-five thousand, seven hundred seventy-nine".