999961110 has 96 divisors (see below), whose sum is σ = 2800631808. Its totient is φ = 246818880.

The previous prime is 999961091. The next prime is 999961129. The reversal of 999961110 is 11169999.

999961110 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (999961091) and next prime (999961129).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a nialpdrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 56379 + ... + 71961.

It is an arithmetic number, because the mean of its divisors is an integer number (29173248).

Almost surely, 2^999961110 is an apocalyptic number.

999961110 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 999961110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1400315904).

999961110 is an abundant number, since it is smaller than the sum of its proper divisors (1800670698).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

999961110 is a wasteful number, since it uses less digits than its factorization.

999961110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15650 (or 15647 counting only the distinct ones).

The product of its (nonzero) digits is 39366, while the sum is 45.

The square root of 999961110 is about 31622.1616908142. The cubic root of 999961110 is about 999.9870364986.

The spelling of 999961110 in words is "nine hundred ninety-nine million, nine hundred sixty-one thousand, one hundred ten".