499991249 has 4 divisors (see below), whose sum is σ = 513504564. Its totient is φ = 486477936.

The previous prime is 499991203. The next prime is 499991257. The reversal of 499991249 is 942199994.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 458259649 + 41731600 = 21407^2 + 6460^2 .

It is a cyclic number.

It is not a de Polignac number, because 499991249 - 2⁸ = 499990993 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 499991194 and 499991203.

It is not an unprimeable number, because it can be changed into a prime (499991299) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6756602 + ... + 6756675.

It is an arithmetic number, because the mean of its divisors is an integer number (128376141).

Almost surely, 2^499991249 is an apocalyptic number.

It is an amenable number.

499991249 is a deficient number, since it is larger than the sum of its proper divisors (13513315).

499991249 is a wasteful number, since it uses less digits than its factorization.

499991249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13513314.

The product of its digits is 1889568, while the sum is 56.

The square root of 499991249 is about 22360.4840958330. The cubic root of 499991249 is about 793.6958955082.

The spelling of 499991249 in words is "four hundred ninety-nine million, nine hundred ninety-one thousand, two hundred forty-nine".