897828809 has 2 divisors, whose sum is σ = 897828810. Its totient is φ = 897828808.

The previous prime is 897828797. The next prime is 897828821. The reversal of 897828809 is 908828798.

It is a balanced prime because it is at equal distance from previous prime (897828797) and next prime (897828821).

It can be written as a sum of positive squares in only one way, i.e., 888218809 + 9610000 = 29803^2 + 3100^2 .

It is a cyclic number.

It is not a de Polignac number, because 897828809 - 2⁸ = 897828553 is a prime.

It is not a weakly prime, because it can be changed into another prime (897828839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 448914404 + 448914405.

It is an arithmetic number, because the mean of its divisors is an integer number (448914405).

Almost surely, 2^897828809 is an apocalyptic number.

It is an amenable number.

897828809 is a deficient number, since it is larger than the sum of its proper divisors (1).

897828809 is an equidigital number, since it uses as much as digits as its factorization.

897828809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4644864, while the sum is 59.

The square root of 897828809 is about 29963.7916325688. The cubic root of 897828809 is about 964.7123661525.

The spelling of 897828809 in words is "eight hundred ninety-seven million, eight hundred twenty-eight thousand, eight hundred nine".