70144009 has 4 divisors (see below), whose sum is σ = 75539716. Its totient is φ = 64748304.

The previous prime is 70144003. The next prime is 70144013. The reversal of 70144009 is 90044107.

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 22534009 + 47610000 = 4747^2 + 6900^2 .

It is a cyclic number.

It is not a de Polignac number, because 70144009 - 2³ = 70144001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70144001) 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, 2697834 + ... + 2697859.

It is an arithmetic number, because the mean of its divisors is an integer number (18884929).

Almost surely, 2^70144009 is an apocalyptic number.

It is an amenable number.

70144009 is a deficient number, since it is larger than the sum of its proper divisors (5395707).

70144009 is a wasteful number, since it uses less digits than its factorization.

70144009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5395706.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 70144009 is about 8375.2020274140. The cubic root of 70144009 is about 412.4109564765.

The spelling of 70144009 in words is "seventy million, one hundred forty-four thousand, nine".