2399709249 has 24 divisors (see below), whose sum is σ = 4036174272. Its totient is φ = 1345387680.

The previous prime is 2399709227. The next prime is 2399709271. The reversal of 2399709249 is 9429079932.

2399709249 is a `hidden beast` number, since 2 + 399 + 7 + 0 + 9 + 249 = 666.

It is an interprime number because it is at equal distance from previous prime (2399709227) and next prime (2399709271).

It is not a de Polignac number, because 2399709249 - 2⁷ = 2399709121 is a prime.

It is a super-2 number, since 2×2399709249² = 11517208959472288002, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2399709195 and 2399709204.

It is not an unprimeable number, because it can be changed into a prime (2399709289) 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 23 ways as a sum of consecutive naturals, for example, 356007 + ... + 362684.

It is an arithmetic number, because the mean of its divisors is an integer number (168173928).

Almost surely, 2^2399709249 is an apocalyptic number.

It is an amenable number.

2399709249 is a deficient number, since it is larger than the sum of its proper divisors (1636465023).

2399709249 is a wasteful number, since it uses less digits than its factorization.

2399709249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 718757 (or 718754 counting only the distinct ones).

The product of its (nonzero) digits is 2204496, while the sum is 54.

The square root of 2399709249 is about 48986.8273008163. The cubic root of 2399709249 is about 1338.8118317865.

The spelling of 2399709249 in words is "two billion, three hundred ninety-nine million, seven hundred nine thousand, two hundred forty-nine".