70840571 has 4 divisors (see below), whose sum is σ = 71152872. Its totient is φ = 70528272.

The previous prime is 70840543. The next prime is 70840577. The reversal of 70840571 is 17504807.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70840571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70840577) 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, 155810 + ... + 156263.

It is an arithmetic number, because the mean of its divisors is an integer number (17788218).

Almost surely, 2^70840571 is an apocalyptic number.

70840571 is a deficient number, since it is larger than the sum of its proper divisors (312301).

70840571 is a wasteful number, since it uses less digits than its factorization.

70840571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312300.

The product of its (nonzero) digits is 7840, while the sum is 32.

The square root of 70840571 is about 8416.6840857906. The cubic root of 70840571 is about 413.7716053741.

The spelling of 70840571 in words is "seventy million, eight hundred forty thousand, five hundred seventy-one".