71378089 has 16 divisors (see below), whose sum is σ = 76446720. Its totient is φ = 66528000.

The previous prime is 71378081. The next prime is 71378093. The reversal of 71378089 is 98087317.

It is a cyclic number.

It is not a de Polignac number, because 71378089 - 2³ = 71378081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71378081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112804 + ... + 113434.

It is an arithmetic number, because the mean of its divisors is an integer number (4777920).

Almost surely, 2^71378089 is an apocalyptic number.

It is an amenable number.

71378089 is a deficient number, since it is larger than the sum of its proper divisors (5068631).

71378089 is a wasteful number, since it uses less digits than its factorization.

71378089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 792.

The product of its (nonzero) digits is 84672, while the sum is 43.

The square root of 71378089 is about 8448.5554386534. Note that the first 3 decimals coincide. The cubic root of 71378089 is about 414.8154964427.

The spelling of 71378089 in words is "seventy-one million, three hundred seventy-eight thousand, eighty-nine".