1009799 has 8 divisors (see below), whose sum is σ = 1161888. Its totient is φ = 859680.

The previous prime is 1009787. The next prime is 1009807. The reversal of 1009799 is 9979001.

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 1009799 - 2¹⁶ = 944263 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1009199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 869 + ... + 1665.

It is an arithmetic number, because the mean of its divisors is an integer number (145236).

2^1009799 is an apocalyptic number.

1009799 is a deficient number, since it is larger than the sum of its proper divisors (152089).

1009799 is an equidigital number, since it uses as much as digits as its factorization.

1009799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 985.

The product of its (nonzero) digits is 5103, while the sum is 35.

The square root of 1009799 is about 1004.8875558987. The cubic root of 1009799 is about 100.3255722104.

The spelling of 1009799 in words is "one million, nine thousand, seven hundred ninety-nine".