999849761 has 8 divisors (see below), whose sum is σ = 1017214848. Its totient is φ = 982576000.

The previous prime is 999849689. The next prime is 999849811. The reversal of 999849761 is 167948999.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 999849761 - 2²² = 995655457 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 999849694 and 999849703.

It is not an unprimeable number, because it can be changed into a prime (999849061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 560 + ... + 44721.

It is an arithmetic number, because the mean of its divisors is an integer number (127151856).

Almost surely, 2^999849761 is an apocalyptic number.

It is an amenable number.

999849761 is a deficient number, since it is larger than the sum of its proper divisors (17365087).

999849761 is a wasteful number, since it uses less digits than its factorization.

999849761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45663.

The product of its digits is 8817984, while the sum is 62.

The square root of 999849761 is about 31620.4010252875. The cubic root of 999849761 is about 999.9499178252.

The spelling of 999849761 in words is "nine hundred ninety-nine million, eight hundred forty-nine thousand, seven hundred sixty-one".