70422809 has 4 divisors (see below), whose sum is σ = 70648116. Its totient is φ = 70197504.

The previous prime is 70422791. The next prime is 70422811. The reversal of 70422809 is 90822407.

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

It can be written as a sum of positive squares in 2 ways, for example, as 31047184 + 39375625 = 5572^2 + 6275^2 .

It is a cyclic number.

It is not a de Polignac number, because 70422809 - 2¹² = 70418713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70422839) 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, 112184 + ... + 112809.

It is an arithmetic number, because the mean of its divisors is an integer number (17662029).

Almost surely, 2^70422809 is an apocalyptic number.

It is an amenable number.

70422809 is a deficient number, since it is larger than the sum of its proper divisors (225307).

70422809 is a wasteful number, since it uses less digits than its factorization.

70422809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225306.

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

The square root of 70422809 is about 8391.8298957975. The cubic root of 70422809 is about 412.9566346954.

The spelling of 70422809 in words is "seventy million, four hundred twenty-two thousand, eight hundred nine".