70853609 has 2 divisors, whose sum is σ = 70853610. Its totient is φ = 70853608.

The previous prime is 70853543. The next prime is 70853623. The reversal of 70853609 is 90635807.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56625625 + 14227984 = 7525^2 + 3772^2 .

It is a cyclic number.

It is not a de Polignac number, because 70853609 - 2¹⁶ = 70788073 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 (70853659) 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, 35426804 + 35426805.

It is an arithmetic number, because the mean of its divisors is an integer number (35426805).

Almost surely, 2^70853609 is an apocalyptic number.

It is an amenable number.

70853609 is a deficient number, since it is larger than the sum of its proper divisors (1).

70853609 is an equidigital number, since it uses as much as digits as its factorization.

70853609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 70853609 is about 8417.4585832067. The cubic root of 70853609 is about 413.7969883017.

The spelling of 70853609 in words is "seventy million, eight hundred fifty-three thousand, six hundred nine".