70209609 has 32 divisors (see below), whose sum is σ = 105390720. Its totient is φ = 41352192.

The previous prime is 70209599. The next prime is 70209611. The reversal of 70209609 is 90690207.

It is not a de Polignac number, because 70209609 - 2¹⁷ = 70078537 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 70209609.

It is not an unprimeable number, because it can be changed into a prime (70209619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 54082 + ... + 55364.

It is an arithmetic number, because the mean of its divisors is an integer number (3293460).

Almost surely, 2^70209609 is an apocalyptic number.

It is an amenable number.

70209609 is a deficient number, since it is larger than the sum of its proper divisors (35181111).

70209609 is a wasteful number, since it uses less digits than its factorization.

70209609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1369.

The product of its (nonzero) digits is 6804, while the sum is 33.

The square root of 70209609 is about 8379.1174356253. The cubic root of 70209609 is about 412.5394812532.

The spelling of 70209609 in words is "seventy million, two hundred nine thousand, six hundred nine".