7089391857 has 8 divisors (see below), whose sum is σ = 9468906976. Its totient is φ = 4718068992.

The previous prime is 7089391831. The next prime is 7089391889. The reversal of 7089391857 is 7581939807.

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

It is not a de Polignac number, because 7089391857 - 2⁸ = 7089391601 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7089391797 and 7089391806.

It is not an unprimeable number, because it can be changed into a prime (7089391817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2046043 + ... + 2049504.

It is an arithmetic number, because the mean of its divisors is an integer number (1183613372).

Almost surely, 2^7089391857 is an apocalyptic number.

It is an amenable number.

7089391857 is a deficient number, since it is larger than the sum of its proper divisors (2379515119).

7089391857 is a wasteful number, since it uses less digits than its factorization.

7089391857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4096127.

The product of its (nonzero) digits is 3810240, while the sum is 57.

The square root of 7089391857 is about 84198.5264538519. The cubic root of 7089391857 is about 1921.0396439277.

The spelling of 7089391857 in words is "seven billion, eighty-nine million, three hundred ninety-one thousand, eight hundred fifty-seven".