70439 has 2 divisors, whose sum is σ = 70440. Its totient is φ = 70438.

The previous prime is 70429. The next prime is 70451. The reversal of 70439 is 93407.

70439 is nontrivially palindromic in base 5.

It is a weak prime.

It is an emirp because it is prime and its reverse (93407) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70439 - 2⁴ = 70423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35219 + 35220.

It is an arithmetic number, because the mean of its divisors is an integer number (35220).

2⁷⁰⁴³⁹ is an apocalyptic number.

70439 is a deficient number, since it is larger than the sum of its proper divisors (1).

70439 is an equidigital number, since it uses as much as digits as its factorization.

70439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 70439 is about 265.4034664431. The cubic root of 70439 is about 41.2988280070.

The spelling of 70439 in words is "seventy thousand, four hundred thirty-nine".