70239439 has 2 divisors, whose sum is σ = 70239440. Its totient is φ = 70239438.

The previous prime is 70239413. The next prime is 70239443. The reversal of 70239439 is 93493207.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 70239439 - 2¹³ = 70231247 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 70239398 and 70239407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70239139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35119719 + 35119720.

It is an arithmetic number, because the mean of its divisors is an integer number (35119720).

Almost surely, 2^70239439 is an apocalyptic number.

70239439 is a deficient number, since it is larger than the sum of its proper divisors (1).

70239439 is an equidigital number, since it uses as much as digits as its factorization.

70239439 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 70239439 is about 8380.8972669995. The cubic root of 70239439 is about 412.5978982823.

The spelling of 70239439 in words is "seventy million, two hundred thirty-nine thousand, four hundred thirty-nine".