897957819 has 40 divisors (see below), whose sum is σ = 1475609520. Its totient is φ = 544151520.

The previous prime is 897957817. The next prime is 897957839. The reversal of 897957819 is 918759798.

It is not a de Polignac number, because 897957819 - 2¹ = 897957817 is a prime.

It is a super-2 number, since 2×897957819² = 1612656489406473522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (897957817) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 103647 + ... + 111975.

It is an arithmetic number, because the mean of its divisors is an integer number (36890238).

Almost surely, 2^897957819 is an apocalyptic number.

897957819 is a deficient number, since it is larger than the sum of its proper divisors (577651701).

897957819 is an equidigital number, since it uses as much as digits as its factorization.

897957819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8374 (or 8343 counting only the distinct ones).

The product of its digits is 11430720, while the sum is 63.

The square root of 897957819 is about 29965.9443201779. The cubic root of 897957819 is about 964.7585707966.

The spelling of 897957819 in words is "eight hundred ninety-seven million, nine hundred fifty-seven thousand, eight hundred nineteen".