70023409 has 2 divisors, whose sum is σ = 70023410. Its totient is φ = 70023408.

The previous prime is 70023407. The next prime is 70023433. The reversal of 70023409 is 90432007.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39187600 + 30835809 = 6260^2 + 5553^2 .

It is a cyclic number.

It is not a de Polignac number, because 70023409 - 2¹ = 70023407 is a prime.

Together with 70023407, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (70023403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35011704 + 35011705.

It is an arithmetic number, because the mean of its divisors is an integer number (35011705).

Almost surely, 2^70023409 is an apocalyptic number.

It is an amenable number.

70023409 is a deficient number, since it is larger than the sum of its proper divisors (1).

70023409 is an equidigital number, since it uses as much as digits as its factorization.

70023409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 70023409 is about 8367.9991037284. Note that the first 3 decimals coincide. The cubic root of 70023409 is about 412.1744654167.

The spelling of 70023409 in words is "seventy million, twenty-three thousand, four hundred nine".