70439357 has 2 divisors, whose sum is σ = 70439358. Its totient is φ = 70439356.

The previous prime is 70439329. The next prime is 70439359. The reversal of 70439357 is 75393407.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37100281 + 33339076 = 6091^2 + 5774^2 .

It is an emirp because it is prime and its reverse (75393407) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70439357 - 2⁶ = 70439293 is a prime.

Together with 70439359, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 70439357.

It is a congruent number.

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35219678 + 35219679.

It is an arithmetic number, because the mean of its divisors is an integer number (35219679).

Almost surely, 2^70439357 is an apocalyptic number.

It is an amenable number.

70439357 is a deficient number, since it is larger than the sum of its proper divisors (1).

70439357 is an equidigital number, since it uses as much as digits as its factorization.

70439357 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 79380, while the sum is 38.

The square root of 70439357 is about 8392.8157968586. The cubic root of 70439357 is about 412.9889777734.

The spelling of 70439357 in words is "seventy million, four hundred thirty-nine thousand, three hundred fifty-seven".