997886895 has 32 divisors (see below), whose sum is σ = 1625992704. Its totient is φ = 522480000.

The previous prime is 997886887. The next prime is 997886899. The reversal of 997886895 is 598688799.

It is not a de Polignac number, because 997886895 - 2³ = 997886887 is a prime.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 265449 + ... + 269181.

It is an arithmetic number, because the mean of its divisors is an integer number (50812272).

Almost surely, 2^997886895 is an apocalyptic number.

997886895 is a deficient number, since it is larger than the sum of its proper divisors (628105809).

997886895 is a wasteful number, since it uses less digits than its factorization.

With its successor (997886896) it forms a Ruth-Aaron pair, since the sum of their distinct prime factors is the same (4063).

997886895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4063.

The product of its digits is 78382080, while the sum is 69.

The square root of 997886895 is about 31589.3478090321. The cubic root of 997886895 is about 999.2951349487.

The spelling of 997886895 in words is "nine hundred ninety-seven million, eight hundred eighty-six thousand, eight hundred ninety-five".