89378857 has 2 divisors, whose sum is σ = 89378858. Its totient is φ = 89378856.

The previous prime is 89378837. The next prime is 89378881. The reversal of 89378857 is 75887398.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84107241 + 5271616 = 9171^2 + 2296^2 .

It is a cyclic number.

It is not a de Polignac number, because 89378857 - 2¹¹ = 89376809 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 89378798 and 89378807.

It is not a weakly prime, because it can be changed into another prime (89378827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44689428 + 44689429.

It is an arithmetic number, because the mean of its divisors is an integer number (44689429).

Almost surely, 2^89378857 is an apocalyptic number.

It is an amenable number.

89378857 is a deficient number, since it is larger than the sum of its proper divisors (1).

89378857 is an equidigital number, since it uses as much as digits as its factorization.

89378857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3386880, while the sum is 55.

The square root of 89378857 is about 9454.0391896797. The cubic root of 89378857 is about 447.1071333246.

The spelling of 89378857 in words is "eighty-nine million, three hundred seventy-eight thousand, eight hundred fifty-seven".