823459949 has 16 divisors (see below), whose sum is σ = 922031040. Its totient is φ = 730477440.

The previous prime is 823459939. The next prime is 823459997. The reversal of 823459949 is 949954328.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-823459949 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 823459949.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (823459939) 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 15 ways as a sum of consecutive naturals, for example, 24182 + ... + 47240.

It is an arithmetic number, because the mean of its divisors is an integer number (57626940).

Almost surely, 2^823459949 is an apocalyptic number.

It is an amenable number.

823459949 is a deficient number, since it is larger than the sum of its proper divisors (98571091).

823459949 is a wasteful number, since it uses less digits than its factorization.

823459949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23180.

The product of its digits is 2799360, while the sum is 53.

The square root of 823459949 is about 28695.9918629763. The cubic root of 823459949 is about 937.3047696343.

The spelling of 823459949 in words is "eight hundred twenty-three million, four hundred fifty-nine thousand, nine hundred forty-nine".