3509999 has 2 divisors, whose sum is σ = 3510000. Its totient is φ = 3509998.

The previous prime is 3509983. The next prime is 3510029. The reversal of 3509999 is 9999053.

It is a weak prime.

It is an emirp because it is prime and its reverse (9999053) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3509999 - 2⁴ = 3509983 is a prime.

3509999 is a modest number, since divided by 9999 gives 350 as remainder.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3509299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1754999 + 1755000.

It is an arithmetic number, because the mean of its divisors is an integer number (1755000).

Almost surely, 2^3509999 is an apocalyptic number.

3509999 is a deficient number, since it is larger than the sum of its proper divisors (1).

3509999 is an equidigital number, since it uses as much as digits as its factorization.

3509999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 98415, while the sum is 44.

The square root of 3509999 is about 1873.4991326392. The cubic root of 3509999 is about 151.9738961406.

The spelling of 3509999 in words is "three million, five hundred nine thousand, nine hundred ninety-nine".