897848779 has 4 divisors (see below), whose sum is σ = 914789376. Its totient is φ = 880908184.

The previous prime is 897848767. The next prime is 897848801. The reversal of 897848779 is 977848798.

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

It is a cyclic number.

It is not a de Polignac number, because 897848779 - 2²³ = 889460171 is a prime.

It is a super-2 number, since 2×897848779² = 1612264859903581682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (897848719) 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, 8470219 + ... + 8470324.

It is an arithmetic number, because the mean of its divisors is an integer number (228697344).

Almost surely, 2^897848779 is an apocalyptic number.

897848779 is a deficient number, since it is larger than the sum of its proper divisors (16940597).

897848779 is a wasteful number, since it uses less digits than its factorization.

897848779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16940596.

The product of its digits is 56899584, while the sum is 67.

The square root of 897848779 is about 29964.1248662463. The cubic root of 897848779 is about 964.7195186530.

The spelling of 897848779 in words is "eight hundred ninety-seven million, eight hundred forty-eight thousand, seven hundred seventy-nine".