70271309 has 2 divisors, whose sum is σ = 70271310. Its totient is φ = 70271308.

The previous prime is 70271303. The next prime is 70271347. The reversal of 70271309 is 90317207.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39413284 + 30858025 = 6278^2 + 5555^2 .

It is an emirp because it is prime and its reverse (90317207) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70271309 - 2⁴ = 70271293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70271303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35135654 + 35135655.

It is an arithmetic number, because the mean of its divisors is an integer number (35135655).

Almost surely, 2^70271309 is an apocalyptic number.

It is an amenable number.

70271309 is a deficient number, since it is larger than the sum of its proper divisors (1).

70271309 is an equidigital number, since it uses as much as digits as its factorization.

70271309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2646, while the sum is 29.

The square root of 70271309 is about 8382.7983991028. The cubic root of 70271309 is about 412.6602920358.

The spelling of 70271309 in words is "seventy million, two hundred seventy-one thousand, three hundred nine".