997886897 has 16 divisors (see below), whose sum is σ = 1241865600. Its totient is φ = 782369280.

The previous prime is 997886887. The next prime is 997886899. The reversal of 997886897 is 798688799.

It is not a de Polignac number, because 997886897 - 2²⁴ = 981109681 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 997886897.

It is not an unprimeable number, because it can be changed into a prime (997886899) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 125504 + ... + 133217.

It is an arithmetic number, because the mean of its divisors is an integer number (77616600).

Almost surely, 2^997886897 is an apocalyptic number.

It is an amenable number.

997886897 is a deficient number, since it is larger than the sum of its proper divisors (243978703).

997886897 is a wasteful number, since it uses less digits than its factorization.

997886897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258776.

The product of its digits is 109734912, while the sum is 71.

The square root of 997886897 is about 31589.3478406883. The cubic root of 997886897 is about 999.2951356163.

The spelling of 997886897 in words is "nine hundred ninety-seven million, eight hundred eighty-six thousand, eight hundred ninety-seven".