70439329 has 2 divisors, whose sum is σ = 70439330. Its totient is φ = 70439328.

The previous prime is 70439293. The next prime is 70439357. The reversal of 70439329 is 92393407.

Together with previous prime (70439293) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44957025 + 25482304 = 6705^2 + 5048^2 .

It is an emirp because it is prime and its reverse (92393407) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70439329 - 2²³ = 62050721 is a prime.

It is not a weakly prime, because it can be changed into another prime (70439359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35219664 + 35219665.

It is an arithmetic number, because the mean of its divisors is an integer number (35219665).

Almost surely, 2^70439329 is an apocalyptic number.

It is an amenable number.

70439329 is a deficient number, since it is larger than the sum of its proper divisors (1).

70439329 is an equidigital number, since it uses as much as digits as its factorization.

70439329 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 37.

The square root of 70439329 is about 8392.8141287652. The cubic root of 70439329 is about 412.9889230516.

The spelling of 70439329 in words is "seventy million, four hundred thirty-nine thousand, three hundred twenty-nine".