70242809 has 8 divisors (see below), whose sum is σ = 86452800. Its totient is φ = 55576656.

The previous prime is 70242797. The next prime is 70242839. The reversal of 70242809 is 90824207.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70242809 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (70242839) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 385859 + ... + 386040.

It is an arithmetic number, because the mean of its divisors is an integer number (10806600).

Almost surely, 2^70242809 is an apocalyptic number.

It is an amenable number.

70242809 is a deficient number, since it is larger than the sum of its proper divisors (16209991).

70242809 is a wasteful number, since it uses less digits than its factorization.

70242809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 771919.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 70242809 is about 8381.0983170465. The cubic root of 70242809 is about 412.6044968196.

The spelling of 70242809 in words is "seventy million, two hundred forty-two thousand, eight hundred nine".