990999910 has 16 divisors (see below), whose sum is σ = 1877684400. Its totient is φ = 375536736.

The previous prime is 990999907. The next prime is 990999913. The reversal of 990999910 is 19999099.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (990999907) and next prime (990999913).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990999913) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2607705 + ... + 2608084.

It is an arithmetic number, because the mean of its divisors is an integer number (117355275).

Almost surely, 2^990999910 is an apocalyptic number.

990999910 is a deficient number, since it is larger than the sum of its proper divisors (886684490).

990999910 is a wasteful number, since it uses less digits than its factorization.

990999910 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5215815.

The product of its (nonzero) digits is 531441, while the sum is 55.

The square root of 990999910 is about 31480.1510479222. The cubic root of 990999910 is about 996.9909245468.

The spelling of 990999910 in words is "nine hundred ninety million, nine hundred ninety-nine thousand, nine hundred ten".