70009 has 2 divisors, whose sum is σ = 70010. Its totient is φ = 70008.

The previous prime is 70003. The next prime is 70019. The reversal of 70009 is 90007.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48400 + 21609 = 220^2 + 147^2 .

It is an emirp because it is prime and its reverse (90007) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70009 - 2³ = 70001 is a prime.

70009 is a modest number, since divided by 9 gives 7 as remainder.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 69974 and 70001.

It is not a weakly prime, because it can be changed into another prime (70001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35004 + 35005.

It is an arithmetic number, because the mean of its divisors is an integer number (35005).

2⁷⁰⁰⁰⁹ is an apocalyptic number.

It is an amenable number.

70009 is a deficient number, since it is larger than the sum of its proper divisors (1).

70009 is an equidigital number, since it uses as much as digits as its factorization.

70009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63, while the sum is 16.

The square root of 70009 is about 264.5921389611. The cubic root of 70009 is about 41.2146191875.

The spelling of 70009 in words is "seventy thousand, nine".