823445134 has 4 divisors (see below), whose sum is σ = 1235167704. Its totient is φ = 411722566.

The previous prime is 823445113. The next prime is 823445159. The reversal of 823445134 is 431544328.

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

It is a self number, because there is not a number n which added to its sum of digits gives 823445134.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 205861282 + ... + 205861285.

It is an arithmetic number, because the mean of its divisors is an integer number (308791926).

Almost surely, 2^823445134 is an apocalyptic number.

823445134 is a deficient number, since it is larger than the sum of its proper divisors (411722570).

823445134 is a wasteful number, since it uses less digits than its factorization.

823445134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411722569.

The product of its digits is 46080, while the sum is 34.

The square root of 823445134 is about 28695.7337247194. The cubic root of 823445134 is about 937.2991485338.

It can be divided in two parts, 82344 and 5134, that added together give a palindrome (87478).

The spelling of 823445134 in words is "eight hundred twenty-three million, four hundred forty-five thousand, one hundred thirty-four".