70735409 has 2 divisors, whose sum is σ = 70735410. Its totient is φ = 70735408.

The previous prime is 70735403. The next prime is 70735421. The reversal of 70735409 is 90453707.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68939809 + 1795600 = 8303^2 + 1340^2 .

It is an emirp because it is prime and its reverse (90453707) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70735409 - 2²⁰ = 69686833 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (70735403) 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, 35367704 + 35367705.

It is an arithmetic number, because the mean of its divisors is an integer number (35367705).

Almost surely, 2^70735409 is an apocalyptic number.

It is an amenable number.

70735409 is a deficient number, since it is larger than the sum of its proper divisors (1).

70735409 is an equidigital number, since it uses as much as digits as its factorization.

70735409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26460, while the sum is 35.

The square root of 70735409 is about 8410.4345309859. The cubic root of 70735409 is about 413.5667576046.

The spelling of 70735409 in words is "seventy million, seven hundred thirty-five thousand, four hundred nine".