70424639 has 4 divisors (see below), whose sum is σ = 70856856. Its totient is φ = 69992424.

The previous prime is 70424623. The next prime is 70424657. The reversal of 70424639 is 93642407.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 70424639 - 2⁴ = 70424623 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 70424599 and 70424608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70424699) 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 in 3 ways as a sum of consecutive naturals, for example, 215864 + ... + 216189.

It is an arithmetic number, because the mean of its divisors is an integer number (17714214).

Almost surely, 2^70424639 is an apocalyptic number.

70424639 is a deficient number, since it is larger than the sum of its proper divisors (432217).

70424639 is a wasteful number, since it uses less digits than its factorization.

70424639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432216.

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 70424639 is about 8391.9389297111. The cubic root of 70424639 is about 412.9602116809.

The spelling of 70424639 in words is "seventy million, four hundred twenty-four thousand, six hundred thirty-nine".