70928779 has 2 divisors, whose sum is σ = 70928780. Its totient is φ = 70928778.

The previous prime is 70928773. The next prime is 70928821. The reversal of 70928779 is 97782907.

It is a weak prime.

It is an emirp because it is prime and its reverse (97782907) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70928779 is a prime.

It is not a weakly prime, because it can be changed into another prime (70928773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35464389 + 35464390.

It is an arithmetic number, because the mean of its divisors is an integer number (35464390).

Almost surely, 2^70928779 is an apocalyptic number.

70928779 is a deficient number, since it is larger than the sum of its proper divisors (1).

70928779 is an equidigital number, since it uses as much as digits as its factorization.

70928779 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 444528, while the sum is 49.

The square root of 70928779 is about 8421.9225239847. The cubic root of 70928779 is about 413.9432717281.

The spelling of 70928779 in words is "seventy million, nine hundred twenty-eight thousand, seven hundred seventy-nine".