70020809 has 8 divisors (see below), whose sum is σ = 73217472. Its totient is φ = 66836880.

The previous prime is 70020803. The next prime is 70020817. The reversal of 70020809 is 90802007.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 70020809 - 2¹⁶ = 69955273 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (70020803) 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 7 ways as a sum of consecutive naturals, for example, 9119 + ... + 14939.

It is an arithmetic number, because the mean of its divisors is an integer number (9152184).

Almost surely, 2^70020809 is an apocalyptic number.

It is an amenable number.

70020809 is a deficient number, since it is larger than the sum of its proper divisors (3196663).

70020809 is a wasteful number, since it uses less digits than its factorization.

70020809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6367.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 70020809 is about 8367.8437485412. The cubic root of 70020809 is about 412.1693639472.

The spelling of 70020809 in words is "seventy million, twenty thousand, eight hundred nine".