70240409 has 2 divisors, whose sum is σ = 70240410. Its totient is φ = 70240408.

The previous prime is 70240399. The next prime is 70240477. The reversal of 70240409 is 90404207.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57078025 + 13162384 = 7555^2 + 3628^2 .

It is a cyclic number.

It is not a de Polignac number, because 70240409 - 2¹⁶ = 70174873 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (70240109) 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, 35120204 + 35120205.

It is an arithmetic number, because the mean of its divisors is an integer number (35120205).

Almost surely, 2^70240409 is an apocalyptic number.

It is an amenable number.

70240409 is a deficient number, since it is larger than the sum of its proper divisors (1).

70240409 is an equidigital number, since it uses as much as digits as its factorization.

70240409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 70240409 is about 8380.9551364985. The cubic root of 70240409 is about 412.5997975861.

The spelling of 70240409 in words is "seventy million, two hundred forty thousand, four hundred nine".