897828389 has 8 divisors (see below), whose sum is σ = 903797400. Its totient is φ = 891878400.

The previous prime is 897828343. The next prime is 897828403. The reversal of 897828389 is 983828798.

It can be written as a sum of positive squares in 4 ways, for example, as 36699364 + 861129025 = 6058^2 + 29345^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-897828389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (897828329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97037 + ... + 105885.

It is an arithmetic number, because the mean of its divisors is an integer number (112974675).

Almost surely, 2^897828389 is an apocalyptic number.

It is an amenable number.

897828389 is a deficient number, since it is larger than the sum of its proper divisors (5969011).

897828389 is a wasteful number, since it uses less digits than its factorization.

897828389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9511.

The product of its digits is 13934592, while the sum is 62.

The square root of 897828389 is about 29963.7846241092. The cubic root of 897828389 is about 964.7122157232.

The spelling of 897828389 in words is "eight hundred ninety-seven million, eight hundred twenty-eight thousand, three hundred eighty-nine".