897917219 has 4 divisors (see below), whose sum is σ = 945176040. Its totient is φ = 850658400.

The previous prime is 897917213. The next prime is 897917231. The reversal of 897917219 is 912719798.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 912719798 = 2 ⋅456359899.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-897917219 is a prime.

It is a super-2 number, since 2×897917219² = 1612510664353387922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (897917213) 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, 23629382 + ... + 23629419.

It is an arithmetic number, because the mean of its divisors is an integer number (236294010).

Almost surely, 2^897917219 is an apocalyptic number.

897917219 is a deficient number, since it is larger than the sum of its proper divisors (47258821).

897917219 is a wasteful number, since it uses less digits than its factorization.

897917219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47258820.

The product of its digits is 571536, while the sum is 53.

The square root of 897917219 is about 29965.2668768359. The cubic root of 897917219 is about 964.7440304743.

The spelling of 897917219 in words is "eight hundred ninety-seven million, nine hundred seventeen thousand, two hundred nineteen".