70405609 has 2 divisors, whose sum is σ = 70405610. Its totient is φ = 70405608.

The previous prime is 70405579. The next prime is 70405631. The reversal of 70405609 is 90650407.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46199209 + 24206400 = 6797^2 + 4920^2 .

It is a cyclic number.

It is not a de Polignac number, because 70405609 - 2⁷ = 70405481 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (70405009) 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, 35202804 + 35202805.

It is an arithmetic number, because the mean of its divisors is an integer number (35202805).

Almost surely, 2^70405609 is an apocalyptic number.

It is an amenable number.

70405609 is a deficient number, since it is larger than the sum of its proper divisors (1).

70405609 is an equidigital number, since it uses as much as digits as its factorization.

70405609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 70405609 is about 8390.8050269328. The cubic root of 70405609 is about 412.9230119125.

The spelling of 70405609 in words is "seventy million, four hundred five thousand, six hundred nine".