70681579 has 2 divisors, whose sum is σ = 70681580. Its totient is φ = 70681578.

The previous prime is 70681573. The next prime is 70681591. The reversal of 70681579 is 97518607.

It is a weak prime.

It is an emirp because it is prime and its reverse (97518607) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70681579 - 2⁵ = 70681547 is a prime.

It is not a weakly prime, because it can be changed into another prime (70681573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35340789 + 35340790.

It is an arithmetic number, because the mean of its divisors is an integer number (35340790).

Almost surely, 2^70681579 is an apocalyptic number.

70681579 is a deficient number, since it is larger than the sum of its proper divisors (1).

70681579 is an equidigital number, since it uses as much as digits as its factorization.

70681579 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 105840, while the sum is 43.

The square root of 70681579 is about 8407.2337305442. The cubic root of 70681579 is about 413.4618221910.

The spelling of 70681579 in words is "seventy million, six hundred eighty-one thousand, five hundred seventy-nine".