897870829 has 2 divisors, whose sum is σ = 897870830. Its totient is φ = 897870828.

The previous prime is 897870797. The next prime is 897870881. The reversal of 897870829 is 928078798.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 865948329 + 31922500 = 29427^2 + 5650^2 .

It is a cyclic number.

It is not a de Polignac number, because 897870829 - 2⁵ = 897870797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (897873829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 448935414 + 448935415.

It is an arithmetic number, because the mean of its divisors is an integer number (448935415).

Almost surely, 2^897870829 is an apocalyptic number.

It is an amenable number.

897870829 is a deficient number, since it is larger than the sum of its proper divisors (1).

897870829 is an equidigital number, since it uses as much as digits as its factorization.

897870829 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4064256, while the sum is 58.

The square root of 897870829 is about 29964.4928039839. The cubic root of 897870829 is about 964.7274160079.

The spelling of 897870829 in words is "eight hundred ninety-seven million, eight hundred seventy thousand, eight hundred twenty-nine".