70023439 has 2 divisors, whose sum is σ = 70023440. Its totient is φ = 70023438.

The previous prime is 70023433. The next prime is 70023463. The reversal of 70023439 is 93432007.

It is a weak prime.

It is an emirp because it is prime and its reverse (93432007) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70023439 - 2⁵ = 70023407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70023433) 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, 35011719 + 35011720.

It is an arithmetic number, because the mean of its divisors is an integer number (35011720).

Almost surely, 2^70023439 is an apocalyptic number.

70023439 is a deficient number, since it is larger than the sum of its proper divisors (1).

70023439 is an equidigital number, since it uses as much as digits as its factorization.

70023439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 28.

The square root of 70023439 is about 8368.0008962715. Note that the first 3 decimals coincide. The cubic root of 70023439 is about 412.1745242791.

The spelling of 70023439 in words is "seventy million, twenty-three thousand, four hundred thirty-nine".