897767797 has 4 divisors (see below), whose sum is σ = 910066060. Its totient is φ = 885469536.

The previous prime is 897767791. The next prime is 897767813. The reversal of 897767797 is 797767798.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 499924881 + 397842916 = 22359^2 + 19946^2 .

It is a cyclic number.

It is not a de Polignac number, because 897767797 - 2²⁷ = 763550069 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 (897767791) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6149022 + ... + 6149167.

It is an arithmetic number, because the mean of its divisors is an integer number (227516515).

Almost surely, 2^897767797 is an apocalyptic number.

It is an amenable number.

897767797 is a deficient number, since it is larger than the sum of its proper divisors (12298263).

897767797 is a wasteful number, since it uses less digits than its factorization.

897767797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12298262.

The product of its digits is 65345616, while the sum is 67.

The square root of 897767797 is about 29962.7735198196. The cubic root of 897767797 is about 964.6905132990.

Subtracting from 897767797 its reverse (797767798), we obtain a palindrome (99999999).

The spelling of 897767797 in words is "eight hundred ninety-seven million, seven hundred sixty-seven thousand, seven hundred ninety-seven".