897682509 has 24 divisors (see below), whose sum is σ = 1313170560. Its totient is φ = 590873472.

The previous prime is 897682477. The next prime is 897682517. The reversal of 897682509 is 905286798.

It is a happy number.

It is not a de Polignac number, because 897682509 - 2⁵ = 897682477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (897682579) 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 in 23 ways as a sum of consecutive naturals, for example, 286252 + ... + 289370.

It is an arithmetic number, because the mean of its divisors is an integer number (54715440).

Almost surely, 2^897682509 is an apocalyptic number.

It is an amenable number.

897682509 is a deficient number, since it is larger than the sum of its proper divisors (415488051).

897682509 is a wasteful number, since it uses less digits than its factorization.

897682509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3521 (or 3518 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 54.

The square root of 897682509 is about 29961.3502532846. The cubic root of 897682509 is about 964.6599637775.

The spelling of 897682509 in words is "eight hundred ninety-seven million, six hundred eighty-two thousand, five hundred nine".