999814961 has 8 divisors (see below), whose sum is σ = 1005961800. Its totient is φ = 993687552.

The previous prime is 999814951. The next prime is 999814967. The reversal of 999814961 is 169418999.

It can be written as a sum of positive squares in 4 ways, for example, as 29866225 + 969948736 = 5465^2 + 31144^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-999814961 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 999814897 and 999814906.

It is not an unprimeable number, because it can be changed into a prime (999814967) 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, 105965 + ... + 115013.

It is an arithmetic number, because the mean of its divisors is an integer number (125745225).

Almost surely, 2^999814961 is an apocalyptic number.

It is an amenable number.

999814961 is a deficient number, since it is larger than the sum of its proper divisors (6146839).

999814961 is a wasteful number, since it uses less digits than its factorization.

999814961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9715.

The product of its digits is 1259712, while the sum is 56.

The square root of 999814961 is about 31619.8507428482. The cubic root of 999814961 is about 999.9383165286.

The spelling of 999814961 in words is "nine hundred ninety-nine million, eight hundred fourteen thousand, nine hundred sixty-one".