70864979 has 2 divisors, whose sum is σ = 70864980. Its totient is φ = 70864978.

The previous prime is 70864961. The next prime is 70864991. The reversal of 70864979 is 97946807.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70864979 is a prime.

It is not a weakly prime, because it can be changed into another prime (70864949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35432489 + 35432490.

It is an arithmetic number, because the mean of its divisors is an integer number (35432490).

Almost surely, 2^70864979 is an apocalyptic number.

70864979 is a deficient number, since it is larger than the sum of its proper divisors (1).

70864979 is an equidigital number, since it uses as much as digits as its factorization.

70864979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 762048, while the sum is 50.

The square root of 70864979 is about 8418.1339381124. The cubic root of 70864979 is about 413.8191213550.

The spelling of 70864979 in words is "seventy million, eight hundred sixty-four thousand, nine hundred seventy-nine".