70839613 has 4 divisors (see below), whose sum is σ = 76288828. Its totient is φ = 65390400.

The previous prime is 70839583. The next prime is 70839617. The reversal of 70839613 is 31693807.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31693807 = 139 ⋅228013.

It can be written as a sum of positive squares in 2 ways, for example, as 37234404 + 33605209 = 6102^2 + 5797^2 .

It is a cyclic number.

It is not a de Polignac number, because 70839613 - 2⁹ = 70839101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70839617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2724588 + ... + 2724613.

It is an arithmetic number, because the mean of its divisors is an integer number (19072207).

Almost surely, 2^70839613 is an apocalyptic number.

It is an amenable number.

70839613 is a deficient number, since it is larger than the sum of its proper divisors (5449215).

70839613 is a wasteful number, since it uses less digits than its factorization.

70839613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5449214.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 70839613 is about 8416.6271748248. The cubic root of 70839613 is about 413.7697401765.

The spelling of 70839613 in words is "seventy million, eight hundred thirty-nine thousand, six hundred thirteen".