889788397 has 2 divisors, whose sum is σ = 889788398. Its totient is φ = 889788396.

The previous prime is 889788371. The next prime is 889788407. The reversal of 889788397 is 793887988.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 784336036 + 105452361 = 28006^2 + 10269^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-889788397 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (889783397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 444894198 + 444894199.

It is an arithmetic number, because the mean of its divisors is an integer number (444894199).

Almost surely, 2^889788397 is an apocalyptic number.

It is an amenable number.

889788397 is a deficient number, since it is larger than the sum of its proper divisors (1).

889788397 is an equidigital number, since it uses as much as digits as its factorization.

889788397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48771072, while the sum is 67.

The square root of 889788397 is about 29829.3210951909. The cubic root of 889788397 is about 961.8239329953.

The spelling of 889788397 in words is "eight hundred eighty-nine million, seven hundred eighty-eight thousand, three hundred ninety-seven".