70240309 has 2 divisors, whose sum is σ = 70240310. Its totient is φ = 70240308.

The previous prime is 70240307. The next prime is 70240343. The reversal of 70240309 is 90304207.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41242084 + 28998225 = 6422^2 + 5385^2 .

It is a cyclic number.

It is not a de Polignac number, because 70240309 - 2¹ = 70240307 is a prime.

Together with 70240307, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70240301) 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, 35120154 + 35120155.

It is an arithmetic number, because the mean of its divisors is an integer number (35120155).

Almost surely, 2^70240309 is an apocalyptic number.

It is an amenable number.

70240309 is a deficient number, since it is larger than the sum of its proper divisors (1).

70240309 is an equidigital number, since it uses as much as digits as its factorization.

70240309 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 70240309 is about 8380.9491705892. The cubic root of 70240309 is about 412.5996017824.

The spelling of 70240309 in words is "seventy million, two hundred forty thousand, three hundred nine".