70086871 has 4 divisors (see below), whose sum is σ = 70598592. Its totient is φ = 69575152.

The previous prime is 70086857. The next prime is 70086883. The reversal of 70086871 is 17868007.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17868007 = 131 ⋅136397.

It is a cyclic number.

It is not a de Polignac number, because 70086871 - 2¹⁹ = 69562583 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 70086871.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70086811) 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, 255655 + ... + 255928.

It is an arithmetic number, because the mean of its divisors is an integer number (17649648).

Almost surely, 2^70086871 is an apocalyptic number.

70086871 is a deficient number, since it is larger than the sum of its proper divisors (511721).

70086871 is a wasteful number, since it uses less digits than its factorization.

70086871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511720.

The product of its (nonzero) digits is 18816, while the sum is 37.

The square root of 70086871 is about 8371.7901908732. The cubic root of 70086871 is about 412.2989453021.

It can be divided in two parts, 700 and 86871, that added together give a triangular number (87571 = T₄₁₈).

The spelling of 70086871 in words is "seventy million, eighty-six thousand, eight hundred seventy-one".