897749218 has 8 divisors (see below), whose sum is σ = 1356453612. Its totient is φ = 445598016.

The previous prime is 897749213. The next prime is 897749219. The reversal of 897749218 is 812947798.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 897182209 + 567009 = 29953^2 + 753^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×897749218² = 1611907316839223048, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (897749213) 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, 1637955 + ... + 1638502.

Almost surely, 2^897749218 is an apocalyptic number.

897749218 is a deficient number, since it is larger than the sum of its proper divisors (458704394).

897749218 is a wasteful number, since it uses less digits than its factorization.

897749218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3276596.

The product of its digits is 2032128, while the sum is 55.

The square root of 897749218 is about 29962.4634834988. The cubic root of 897749218 is about 964.6838586055.

The spelling of 897749218 in words is "eight hundred ninety-seven million, seven hundred forty-nine thousand, two hundred eighteen".