70870693 has 4 divisors (see below), whose sum is σ = 73314540. Its totient is φ = 68426848.

The previous prime is 70870687. The next prime is 70870711. The reversal of 70870693 is 39607807.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39607807 = 17 ⋅2329871.

It can be written as a sum of positive squares in 2 ways, for example, as 49322529 + 21548164 = 7023^2 + 4642^2 .

It is a cyclic number.

It is not a de Polignac number, because 70870693 - 2¹⁷ = 70739621 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70870193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1221880 + ... + 1221937.

It is an arithmetic number, because the mean of its divisors is an integer number (18328635).

Almost surely, 2^70870693 is an apocalyptic number.

It is an amenable number.

70870693 is a deficient number, since it is larger than the sum of its proper divisors (2443847).

70870693 is a wasteful number, since it uses less digits than its factorization.

70870693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2443846.

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 70870693 is about 8418.4733176509. The cubic root of 70870693 is about 413.8302434398.

The spelling of 70870693 in words is "seventy million, eight hundred seventy thousand, six hundred ninety-three".