70005639 has 12 divisors (see below), whose sum is σ = 102598328. Its totient is φ = 42427440.

The previous prime is 70005631. The next prime is 70005653. The reversal of 70005639 is 93650007.

It is not a de Polignac number, because 70005639 - 2³ = 70005631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70005631) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 96064 + ... + 96789.

Almost surely, 2^70005639 is an apocalyptic number.

70005639 is a deficient number, since it is larger than the sum of its proper divisors (32592689).

70005639 is a wasteful number, since it uses less digits than its factorization.

70005639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192878 (or 192867 counting only the distinct ones).

The product of its (nonzero) digits is 5670, while the sum is 30.

The square root of 70005639 is about 8366.9372532606. The cubic root of 70005639 is about 412.1395963160.

The spelling of 70005639 in words is "seventy million, five thousand, six hundred thirty-nine".