70686017 has 4 divisors (see below), whose sum is σ = 74844036. Its totient is φ = 66528000.

The previous prime is 70685999. The next prime is 70686029. The reversal of 70686017 is 71068607.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71068607 = 19 ⋅3740453.

It can be written as a sum of positive squares in 2 ways, for example, as 38887696 + 31798321 = 6236^2 + 5639^2 .

It is a cyclic number.

It is not a de Polignac number, because 70686017 - 2⁸ = 70685761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70686067) 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 in 3 ways as a sum of consecutive naturals, for example, 2078984 + ... + 2079017.

It is an arithmetic number, because the mean of its divisors is an integer number (18711009).

Almost surely, 2^70686017 is an apocalyptic number.

It is an amenable number.

70686017 is a deficient number, since it is larger than the sum of its proper divisors (4158019).

70686017 is a wasteful number, since it uses less digits than its factorization.

70686017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4158018.

The product of its (nonzero) digits is 14112, while the sum is 35.

The square root of 70686017 is about 8407.4976657743. The cubic root of 70686017 is about 413.4704755780.

The spelling of 70686017 in words is "seventy million, six hundred eighty-six thousand, seventeen".