2499999909 has 32 divisors (see below), whose sum is σ = 3684538368. Its totient is φ = 1495200000.

The previous prime is 2499999883. The next prime is 2499999959. The reversal of 2499999909 is 9099999942.

It is not a de Polignac number, because 2499999909 - 2⁸ = 2499999653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2499999959) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 934644 + ... + 937314.

It is an arithmetic number, because the mean of its divisors is an integer number (115141824).

Almost surely, 2^2499999909 is an apocalyptic number.

It is an amenable number.

2499999909 is a deficient number, since it is larger than the sum of its proper divisors (1184538459).

2499999909 is a wasteful number, since it uses less digits than its factorization.

2499999909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3049.

The product of its (nonzero) digits is 38263752, while the sum is 69.

The square root of 2499999909 is about 49999.9990900000. Note that the first 3 decimals coincide. The cubic root of 2499999909 is about 1357.2087918300.

The spelling of 2499999909 in words is "two billion, four hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred nine".