897667889 has 2 divisors, whose sum is σ = 897667890. Its totient is φ = 897667888.

The previous prime is 897667879. The next prime is 897667907. The reversal of 897667889 is 988766798.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 852172864 + 45495025 = 29192^2 + 6745^2 .

It is a cyclic number.

It is not a de Polignac number, because 897667889 - 2¹⁶ = 897602353 is a prime.

It is not a weakly prime, because it can be changed into another prime (897667879) 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 as a sum of consecutive naturals, namely, 448833944 + 448833945.

It is an arithmetic number, because the mean of its divisors is an integer number (448833945).

Almost surely, 2^897667889 is an apocalyptic number.

It is an amenable number.

897667889 is a deficient number, since it is larger than the sum of its proper divisors (1).

897667889 is an equidigital number, since it uses as much as digits as its factorization.

897667889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 73156608, while the sum is 68.

The square root of 897667889 is about 29961.1062712978. The cubic root of 897667889 is about 964.6547268089.

The spelling of 897667889 in words is "eight hundred ninety-seven million, six hundred sixty-seven thousand, eight hundred eighty-nine".