70065989 has 16 divisors (see below), whose sum is σ = 81328512. Its totient is φ = 59125248.

The previous prime is 70065979. The next prime is 70065991. The reversal of 70065989 is 98956007.

It is not a de Polignac number, because 70065989 - 2⁴ = 70065973 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 (70065929) 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 15 ways as a sum of consecutive naturals, for example, 223697 + ... + 224009.

It is an arithmetic number, because the mean of its divisors is an integer number (5083032).

Almost surely, 2^70065989 is an apocalyptic number.

It is an amenable number.

70065989 is a deficient number, since it is larger than the sum of its proper divisors (11262523).

70065989 is a wasteful number, since it uses less digits than its factorization.

70065989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 716.

The product of its (nonzero) digits is 136080, while the sum is 44.

The square root of 70065989 is about 8370.5429334064. The cubic root of 70065989 is about 412.2579938293.

The spelling of 70065989 in words is "seventy million, sixty-five thousand, nine hundred eighty-nine".