70209839 has 8 divisors (see below), whose sum is σ = 80417568. Its totient is φ = 60046560.

The previous prime is 70209809. The next prime is 70209851. The reversal of 70209839 is 93890207.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 70209839 - 2¹² = 70205743 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70209809) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7652 + ... + 14105.

It is an arithmetic number, because the mean of its divisors is an integer number (10052196).

Almost surely, 2^70209839 is an apocalyptic number.

70209839 is a deficient number, since it is larger than the sum of its proper divisors (10207729).

70209839 is a wasteful number, since it uses less digits than its factorization.

70209839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22225.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 70209839 is about 8379.1311602099. The cubic root of 70209839 is about 412.5399317327.

The spelling of 70209839 in words is "seventy million, two hundred nine thousand, eight hundred thirty-nine".