9997858 has 8 divisors (see below), whose sum is σ = 16150428. Its totient is φ = 4614384.

The previous prime is 9997831. The next prime is 9997859. The reversal of 9997858 is 8587999.

It can be written as a sum of positive squares in 2 ways, for example, as 9903609 + 94249 = 3147^2 + 307^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 9997799 and 9997808.

It is not an unprimeable number, because it can be changed into a prime (9997859) 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, 192241 + ... + 192292.

Almost surely, 2^9997858 is an apocalyptic number.

9997858 is a deficient number, since it is larger than the sum of its proper divisors (6152570).

9997858 is a wasteful number, since it uses less digits than its factorization.

9997858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384548.

The product of its digits is 1632960, while the sum is 55.

The square root of 9997858 is about 3161.9389620927. The cubic root of 9997858 is about 215.4280852410.

The spelling of 9997858 in words is "nine million, nine hundred ninety-seven thousand, eight hundred fifty-eight".